554402273866106873733414
554,402,273,866,106,873,733,414 is an even composite number composed of six prime numbers multiplied together.
What does the number 554402273866106873733414 look like?
This visualization shows the relationship between its 6 prime factors (large circles) and 1536 divisors.
554402273866106873733414 is an even composite number. It is composed of six distinct prime numbers multiplied together. It has a total of one thousand, five hundred thirty-six divisors.
Prime factorization of 554402273866106873733414:
2 × 32 × 73 × 173 × 2413 × 10933
(2 × 3 × 3 × 7 × 7 × 7 × 17 × 17 × 17 × 241 × 241 × 241 × 1093 × 1093 × 1093)See below for interesting mathematical facts about the number 554402273866106873733414 from the Numbermatics database.
Names of 554402273866106873733414
- Cardinal: 554402273866106873733414 can be written as Five hundred fifty-four sextillion, four hundred two quintillion, two hundred seventy-three quadrillion, eight hundred sixty-six trillion, one hundred six billion, eight hundred seventy-three million, seven hundred thirty-three thousand, four hundred fourteen.
Scientific notation
- Scientific notation: 5.54402273866106873733414 × 1023
Factors of 554402273866106873733414
Divisors of 554402273866106873733414
- Number of divisors d(n): 1536
-
Complete list of divisors:
1 2 3 6 7 9 14 17 18 21 34 42 49 51 63 98 102 119 126 147 153 238 241 289 294 306 343 357 441 482 578 686 714 723 833 867 882 1029 1071 1093 1446 1666 1687 1734 2023 2058 2142 2169 2186 2499 2601 3087 3279 3374 4046 4097 4338 4913 4998 5061 5202 5831 6069 6174 6558 7497 7651 8194 9826 9837 10122 11662 11809 12138 12291 14161 14739 14994 15183 15302 17493 18207 18581 19674 22953 23618 24582 28322 28679 29478 30366 34391 34986 35427 36414 36873 37162 42483 44217 45906 52479 53557 55743 57358 58081 68782 68859 69649 70854 73746 82663 84966 86037 88434 99127 103173 104958 106281 107114 111486 116162 127449 130067 137718 139298 160671 165326 167229 172074 174243 198254 200753 206346 208947 212562 240737 247989 254898 258111 260134 263413 297381 309519 315877 321342 334458 348486 374899 390201 401506 406567 417894 481474 482013 487543 495978 516222 522729 526826 594762 602259 619038 626841 631754 722211 743967 749798 780402 790239 813134 892143 910469 947631 964026 975086 987377 1045458 1124697 1170603 1184033 1194649 1204518 1219701 1253682 1405271 1444422 1462629 1487934 1580478 1685159 1784286 1806777 1820938 1843891 1895262 1974754 2166633 2211139 2249394 2341206 2368066 2370717 2389298 2439402 2731407 2810542 2842893 2845969 2925258 2962131 3370318 3374091 3412801 3552099 3583947 3613554 3659103 3687782 4215813 4333266 4387887 4422278 4478021 4741434 5055477 5369909 5462814 5531673 5685786 5691938 5924262 6373283 6633417 6748182 6825602 6911639 7104198 7167894 7318206 8194221 8288231 8362543 8431626 8537907 8775774 8886393 8956042 10110954 10238403 10656297 10739818 10751841 11063346 12647439 12746566 12907237 13266834 13434063 13823278 13997521 15166431 15477973 16109727 16388442 16576462 16595019 16725086 16785409 17075814 17772786 19119849 19900251 19921783 20309033 20476806 20734917 21312594 21503682 23889607 24864693 25087629 25294878 25613721 25814474 26868126 27995042 30332862 30715209 30955946 31346147 32219454 33190038 33570818 37589363 38239698 38721711 39800502 39843566 40302189 40618066 41469834 41992563 46433919 47779214 48329181 48381473 49729386 50175258 50356227 51227442 57359547 58017617 58537801 59765349 60927099 61430418 62204751 62692294 63482533 71668821 74594079 75178726 75262887 76126357 77443422 80604378 83985126 90350659 92867838 94038441 96658362 96762946 97982647 100712454 108345811 112768089 114719094 116035234 116165133 117075602 117497863 119530698 121854198 124409502 125977689 126965066 139301757 142163231 143337642 145144419 149188158 150525774 151068681 152252714 174052851 175613403 179296047 180701318 182781297 188076882 190447599 195965294 215006463 216691622 219423029 225536178 228379071 232330266 234995726 237957857 251955378 263125541 271051977 278603514 282115323 284326462 285351953 287910409 290288838 293947941 302137362 325037433 338304267 338670311 345253561 348105702 351226806 352493589 358592094 365562594 380895198 406123319 409764607 426489693 430012926 435433257 438846058 444377731 456758142 475915714 522158553 526251082 526840209 532884499 542103954 564230646 570703906 571342797 575820818 587895882 650074866 658269087 676608534 677340622 685137213 685878529 690507122 704987178 713873571 789376623 812246638 813155931 819529214 822485041 852979386 856055859 863731227 870866514 881843823 888755462 975112299 995142617 1016010933 1035760683 1044317106 1053680418 1057480767 1065768998 1079203061 1142685594 1218369957 1229293821 1279469079 1294148069 1305751357 1316538174 1333133193 1370274426 1371757058 1427747142 1535961203 1578753246 1598653497 1626311862 1644970082 1665704999 1712111718 1727462454 1763687646 1841878787 1950224598 1974807261 1990285234 1997463671 2015372863 2032021866 2057635587 2071521366 2114961534 2141620713 2158406122 2368129869 2416774927 2436739914 2458587642 2467455123 2558938158 2568167577 2588296138 2591193681 2611502714 2666266386 2985427851 3048032799 3071922406 3107282049 3110644117 3197306994 3237609183 3331409998 3655109871 3683757574 3687881463 3730191493 3882444207 3917254071 3949614522 3994927342 3999399579 4030745726 4045283569 4115271174 4283241426 4607883609 4736259738 4795960491 4801149703 4833549854 4894476953 4934910246 4997114997 5136335154 5182387362 5525636361 5757395287 5869310537 5970855702 5992391013 6046118589 6096065598 6172906761 6214564098 6221288234 6475218366 6965998319 7250324781 7310219742 7375762926 7402365369 7460382986 7554421427 7764888414 7834508142 7998799158 8090567138 8956283553 9059036483 9140259499 9215767218 9331932351 9591920982 9602299406 9712827549 9788953906 9994229994 11051272722 11190574479 11514790574 11647332621 11659934993 11738621074 11751762213 11984782026 12092237178 12135850707 12345813522 13823650827 13931996638 13982245697 14107610041 14403449109 14500649562 14683430859 14804730738 14991344991 15108842854 15299290453 16576909083 16917424489 17272185861 17607931611 17912567106 17977173039 18118072966 18138355767 18280518998 18346452037 18663864702 19425655098 20897994957 21750974343 21774508819 22197773069 22381148958 22663264281 23294665242 23319869986 23503524426 24271701414 26111340451 27177109449 27420778497 27647301654 27964491394 27995797053 28215220082 28316984983 28806898218 29366861718 29982689982 30598580906 33153818166 33571723437 33834848978 34261338671 34544371722 34979804979 35215863222 35954346078 36276711534 36407552121 36692904074 41085173759 41795989914 41946737091 42322830123 43210347327 43501948686 43549017638 44050292577 44395546138 45326528562 45897871359 50752273467 51816557583 52222680902 52823794833 52880949989 54354218898 54841556994 55039356111 55991594106 56633969966 62693984871 63413255381 63981816493 65323526457 66593319207 67143446874 67989792843 68522677342 68769820673 69386408569 69959609958 72815104242 78334021353 81531328347 81619544951 82170347518 82262335491 83206108201 83893474182 84645660246 84950954949 86420694654 88100585154 91795742718 97875719879 98753270287 101504546934 102784016013 103633115166 104939414937 105647589666 105761899978 107095033171 110078712222 118421971423 123255521277 125387969742 125840211273 126826510762 126968490369 127963632986 128425164259 130647052914 133186638414 135979585686 137539641346 137693614077 138772817138 152256820401 155384411483 156668042706 158642849967 163062656694 163239089902 164524670982 165118068333 166412216402 169901909898 190239766143 191945449479 195751439758 195970579371 197506540574 198218894881 199779957621 205568032026 206309462019 208159225707 209878829874 214190066342 235002064059 236843942846 239829370697 244858634853 246511042554 249618324603 251680422546 253936980738 254852864847 256850328518 260087937701 275387228154 287596216313 293627159637 296259810861 304513640802 308352048039 310768822966 311889684629 314686077037 317285699934 321285099513 330236136666 355265914269 369766563831 370166649923 377362142173 380479532286 383890898958 385275492777 391941158742 396437789762 399559915242 412618924038 416318451414 443892787667 447872715451 466153234449 470004128118 475928549901 479658741394 481388744711 485704859983 489717269706 499236649206 509705729694 520175875402 570719298429 575192432626 575836348437 582442757407 587254319274 592519621722 594656684643 616704096078 618928386057 623779369258 624477677121 629372154074 642570199026 710531828538 719488112091 734575904559 739533127662 740333299846 748854973809 749665232197 754724284346 770550985554 780263813103 862788648939 880881478911 887785575334 888779432583 895745430902 898976149813 932306468898 935669053887 944058231111 951857099802 962777489422 963855298539 971409719966 1065797742807 1087690880381 1110499949769 1132086426519 1141438596858 1151672696874 1155826478331 1164885514814 1179568945673 1189313369286 1237856772114 1248955354242 1331678363001 1343618146353 1387532264167 1398459703347 1414503839417 1438976224182 1444166234133 1457114579949 1469151809118 1497709947618 1499330464394 1560527626206 1678805594879 1725577297878 1747328272221 1761762957822 1777558865166 1783970053929 1797952299626 1820615563907 1871338107774 1888116462222 1927710597078 2013173514191 2131595485614 2158464336273 2175381760762 2183227792403 2202802539259 2220999899538 2248995696591 2264172853038 2311652956662 2340791439309 2359137891346 2588365946817 2641534995211 2663356726002 2687236292706 2696928449439 2775064528334 2796919406694 2807007161661 2829007678834 2832174693333 2888332468266 2914229159898 3263072641143 3331499849307 3357611189758 3369721212977 3396259279557 3399934019881 3494656544442 3538706837019 3567940107858 3641231127814 3995035089003 4026347028382 4030854439059 4077099301849 4162596792501 4243511518251 4316928672546 4332498702399 4366455584806 4371343739847 4405605078518 4421494940917 4497991393182 4681582878618 5036416784637 5176731893634 5241984816663 5247656625379 5283069990422 5349663309629 5393856898878 5461846691721 5614014323322 5664349386666 6039520542573 6292833048691 6415156416941 6526145282286 6549683377209 6608407617777 6662999698614 6739442425954 6746987089773 6792518559114 6799868039762 7077413674038 7613836162667 7924604985633 7990070178006 8061708878118 8090785348317 8154198603698 8256982619711 8325193585002 8487023036502 8664997404798 8742687479694 8842989881834 9789217923429 9901526875919 10072833569274 10109163638931 10199802059643 10483969633326 10495313250758 10616120511057 10699326619258 10923693383442 12079041085146 12231297905547 12487790377503 12585666097382 12730534554753 12744308947349 12830312833882 13099366754418 13216815235554 13264484822751 13493974179546 15109250353911 15227672325334 15282594546821 15419617774813 15742969876137 15849209971266 16048989928887 16181570696634 16385540075163 16513965239422 16722124465129 18118561627719 18490744966477 18878499146073 19245469250823 19578435846858 19649050131627 19803053751838 19825222853331 20052672076441 20218327277862 20399604119286 21232241022114 22841508488001 23588048490839 23773814956899 23799538139167 24462595811094 24770947859133 24975580755006 25461069109506 25488617894698 26528969645502 28539695112943 29704580627757 30218500707822 30327490916793 30565189093642 30599406178929 30839235549626 30950464586419 31485939752274 32097979857774 32771080150326 33444248930258 36237123255438 36693893716641 36981489932954 37447643167403 37756998292146 38232926842047 38490938501646 39298100263254 39650445706662 39793454468253 40105344152882 44906094918587 45683016976002 45847783640463 46258853324439 47176096981678 47228909628411 47547629913798 47599076278334 48146969786661 49541895718266 50166373395387 55472234899431 56635497438219 57079390225886 57736407752469 57798878337977 59409161255514 60158016229323 60654981833586 61198812357858 61900929172838 68524525464003 69310688131433 70764145472517 71398614417501 73387787433282 74312843577399 74895286334806 75165413995589 75839344565917 76465853684094 79586908936506 85619085338829 89113741883271 89210162631443 89812189837174 90944276263693 91695567280926 92517706648878 92851393759257 94457819256822 96293939573322 100332746790774 106978161827747 107937324423691 110944469798862 112342929502209 113270994876438 114698780526141 115472815504938 115597756675954 117054871255903 120316032458646 129435214765339 134718284755761 137049050928006 137543350921389 138621376262866 138776559973317 140368704535087 141528290945034 142797228835002 148625687154798 150330827991178 150499120186161 151678689131834 166416704698293 171238170677658 173396635013931 178227483766542 178420325262886 180474048687969 181888552527386 185702787518514 207932064394299 212292436417551 213956323655494 214195843252503 215874648847382 216653252104933 224685859004418 225496241986767 227518033697751 229397561052282 234109742511806 256857256016487 258870429530678 262133502171821 267630487894329 269436569511522 272832828791079 275086701842778 277553119946634 278554181277771 280737409070174 284276115907193 300998240372322 314342664430109 320934485483241 323811973271073 332833409396586 337028788506627 340895425299497 346793270027862 351164613767709 360948097375938 388305644296017 404154854267283 404592148365839 415864128788598 421106113605261 424584872835102 428391686505006 433306504209866 450992483973534 455036067395502 485174816920031 513714512032974 520189905041793 524267004343642 526157897969123 530875411961419 535260975788658 545665657582158 557108362555542 568552231814386 623796193182897 628685328860218 636609933845851 641868970966482 647623946542146 649959756314799 674057577013254 676488725960301 681790850598994 682554101093253 702329227535418 776611288592034 786400506515463 802891463682987 808309708534566 809184296731678 818498486373237 819384098791321 842212227210522 852828347721579 943027993290327 962803456449723 970349633840062 971435919813219 982580931745609 1022686275898491 1040379810083586 1052315795938246 1053493841303127 1061750823922838 1164916932888051 1213776445097517 1247592386365794 1263318340815783 1273219867691702 1289268857620589 1299919512629598 1352977451920602 1365108202186506 1455524450760093 1516572764734531 1546052696482781 1572801013030926 1578473693907369 1592626235884257 1605782927365974 1636996972746474 1638768197582642 1705656695443158 1834934515202747 1886055986580654 1909829801537553 1925606912899446 1942871839626438 1949879268944397 1965161863491218 1989932811350351 2045372551796982 2106987682606254 2200398651010763 2329833865776102 2359201519546389 2386267977096479 2427552890195034 2458152296373963 2526636681631566 2558485043164737 2578537715241178 2829083979870981 2911048901520186 2947742795236827 3033145529469062 3068058827695473 3092105392965562 3156947387814738 3185252471768514 3641329335292551 3669869030405494 3683105285783861 3716127883729933 3819659603075106 3867806572861767 3899758537888794 3979865622700702 4366573352280279 4400797302021526 4456269536920957 4549718294203593 4638158089448343 4718403039092778 4735421081722107 4772535954192958 4777878707652771 4832693970422281 4916304592747926 5116970086329474 5504803545608241 5658167959741962 5729489404612659 5735688691539247 5895485590473654 5969798434051053 6136117655390946 6601195953032289 6878066522219263 7158803931289437 7282658670585102 7366210571567722 7374456889121889 7432255767459866 7735613145723534 8733146704560558 8843228385710481 8912539073841914 9024882003344123 9099436588407186 9276316178896686 9470842163444214 9555757415305542 9665387940844562 10822368875379467 11009607091216482 11049315857351583 11148383651189799 11458978809225318 11471377383078494 11603419718585301 11939596868102106 13202391906064578 13368808610762871 13649154882610779 13756133044438526 13914474268345029 13929529679452457 14317607862578874 14498081911266843 14748913778243778 16514410636824723 16703875839675353 17207066074617741 17686456771420962 17909395302153159 18049764006688246 18277282040385997 19803587859096867 20634199566657789 21476411793868311 21644737750758934 21917570579550013 22098631714703166 22296767302379598 23206839437170602 25781737000487027 26012895186109531 26737617221525742 27074646010032369 27298309765221558 27828948536690058 27859059358904914 28996163822533686 31193886758446699 32467106626138401 33028821273649446 33147947572054749 33407751679350706 33445150953569397 33828857792955967 34414132149235482 35818790604306318 36554564080771994 39607175718193734 40106425832288613 41268399133315578 41788589038357371 42952823587736622 43494245733800529 43835141159100026 50111627519026059 51563474000974054 51621198223853223 52025790372219062 54149292020064738 54831846121157991 61902598699973367 62387773516893398 63174174023408861 64934213252276802 65752711738650039 66295895144109498 66890301907138794 67657715585911934 75756582127656269 77345211001461081 78038685558328593 80212851664577226 81223938030097107 82155797497178777 83577178076714742 86988491467601058 93581660275340097 97401319878415203 97506707756167199 100223255038052118 101486573378867901 103242396447706446 109663692242315982 116927130877727471 123805197399946734 125365767115072113 126348348046817722 127940974282701979 131505423477300078 150334882557078177 151513164255312538 153422994056850091 154690422002922162 156077371116657186 162447876060194214 164311594994357554 164495538363473973 187163320550680194 189522522070226583 194802639756830406 195013415512334398 197258135215950117 202973146757735802 227269746382968807 232035633004383243 233854261755454942 234116056674985779 236802004550691769 246467392491536331 250731534230144226 255881948565403958 280744980826020291 292520123268501597 300669765114156354 304459720136603703 306845988113700182 310713794686561949 328991076726947946 350781392633182413 372598699852350221 379045044140453166 383822922848105937 394516270431900234 442219218163862027 454539492765937614 460268982170550273 464071266008766486 468232113349971558 473604009101383538 492934784983072662 530296074893593883 561489961652040582 568567566210679749 575090582480251439 585040246537003194 608919440273207406 621427589373123898 681809239148906421 701562785266364826 710406013652075307 739402177474608993 745197399704700442 767645845696211874 877560369805504791 884438436327724054 895586819978913853 920537964341100546 932141384059685847 1052344177899547239 1060592149787187766 1073960958397950637 1117796099557050663 1137135132421359498 1150181164960502878 1151468768544317811 1326657654491586081 1363618478297812842 1380806946511650819 1420812027304150614 1478804354949217986 1590888224680781649 1657614031854842383 1725271747440754317 1755120739611009582 1791173639957827706 1864282768119371694 2104688355799094478 2131218040956225921 2147921916795901274 2174996562805933643 2235592199114101326 2302937537088635622 2608190898966451547 2653315308983172162 2686760459936741559 2761613893023301638 2796424152179057541 3181776449361563298 3221882875193851911 3315228063709684766 3353388298671151989 3450543494881508634 3979972963474758243 4025634077361760073 4262436081912451842 4349993125611867286 4772664674042344947 4972842095564527149 5175815242322262951 5216381797932903094 5282134509671553133 5373520919873483118 5592848304358115082 6269107739852396971 6443765750387703822 6524989688417800929 6706776597342303978 7517726708785654459 7824572696899354641 7959945926949516486 8051268154723520146 8060281379810224677 9545329348084689894 9665648625581555733 9945684191129054298 10351630484644525902 10564269019343106266 12076902232085280219 12538215479704793942 13049979376835601858 14918526286693581447 15035453417571308918 15224975939641535501 15649145393798709282 15846403529014659399 16120562759620449354 18257336292765160829 18807323219557190913 19331297251163111466 19574969065253402787 22553180126356963377 23473718090698063923 24153804464170560438 28179438541532320511 29837052573387162894 30449951879283071002 31692807058029318798 36230706696255840657 36514672585530321658 36974941567700871931 37614646439114381826 39149938130506805574 45106360252713926754 45674927818924606503 46947436181396127846 47539210587043978197 54772008878295482487 56358877083064641022 56421969658671572739 67659540379070890131 72461413392511681314 73949883135401743862 84538315624596961533 89796286664416403261 91349855637849213006 95078421174087956394 106574831577490748507 109544017756590964974 110924824703102615793 112843939317343145478 127801354049356125803 135319080758141780262 137024783456773819509 164316026634886447461 169076631249193923066 179592573328832806522 213149663154981497014 221849649406205231586 253614946873790884599 255602708098712251606 258824590973906103517 269388859993249209783 274049566913547639018 319724494732472245521 328632053269772894922 332774474109307847379 383404062148068377409 507229893747581769198 517649181947812207034 538777719986498419566 628574006650914822827 639448989464944491042 665548948218615694758 766808124296136754818 776473772921718310551 808166579979747629349 959173484197416736563 1150212186444205132227 1257148013301829645654 1552947545843436621102 1616333159959495258698 1811772136817342724619 1885722019952744468481 1918346968394833473126 2300424372888410264454 2329421318765154931653 3623544273634685449238 3771444039905488936962 4400018046556403759789 4658842637530309863306 5435316410452028173857 5657166059858233405443 8800036093112807519578 10870632820904056347714 11314332119716466810886 13200054139669211279367 16305949231356084521571 26400108279338422558734 30800126325894826318523 32611898462712169043142 39600162419007633838101 61600252651789652637046 79200324838015267676202 92400378977684478955569 184800757955368957911138 277201136933053436866707 554402273866106873733414
- Sum of all divisors σ(n): 1495925754509308636800000
- Sum of proper divisors (its aliquot sum) s(n): 941523480643201763066586
- 554402273866106873733414 is an abundant number, because the sum of its proper divisors (941523480643201763066586) is greater than itself. Its abundance is 387121206777094889333172
Bases of 554402273866106873733414
- Binary: 11101010110011000110101000111011110110000010110100100011000001001100001001001102
- Hexadecimal: 0x7566351DEC1691826126
- Base-36: 2IA2GKE9RBQQGRHI
Squares and roots of 554402273866106873733414
- 554402273866106873733414 squared (5544022738661068737334142) is 307361881267909768667598552028311941846740095396
- 554402273866106873733414 cubed (5544022738661068737334143) is 170402125874693535797990930471074834307023714386509518892736297032761944
-
The
square root of 554402273866106873733414 is 744581945702.4907434737 -
The
cube root of 554402273866106873733414 is 82150144.9918570217
Scales and comparisons
How big is 554402273866106873733414?- 554,402,273,866,106,873,733,414 seconds is equal to 293,274,701,009 years, 3 weeks, 3 days, 15 hours, 30 minutes, 7 seconds.
-
To count from 1 to 554,402,273,866,106,873,733,414 would take you about two hundred ninety-three billion, two hundred seventy-four million, seven hundred one thousand and nine years!
This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)
- A cube with a volume of 554402273866106873733414 cubic inches would be around 6845845.4 feet tall.
Recreational maths with 554402273866106873733414
- 554402273866106873733414 backwards is 414337378601668372204455
- The number of decimal digits it has is: 24
- The sum of 554402273866106873733414's digits is 99
- More coming soon!
Link to this page
HTML: To link to this page, just copy and paste the link below into your blog, web page or email.
BBCODE: To link to this page in a forum post or comment box, just copy and paste the link code below:
Cite this page
MLA style:
"Number 554402273866106873733414 - Facts about the integer". Numbermatics.com. 2024. Web. 20 June 2024.
APA style:
Numbermatics. (2024). Number 554402273866106873733414 - Facts about the integer. Retrieved 20 June 2024, from https://numbermatics.com/n/554402273866106873733414/
Chicago style:
Numbermatics. 2024. "Number 554402273866106873733414 - Facts about the integer". https://numbermatics.com/n/554402273866106873733414/
The information we have on file for 554402273866106873733414 includes mathematical data and numerical statistics calculated using standard algorithms and methods. We are adding more all the time. If there are any features you would like to see, please contact us. Information provided for educational use, intellectual curiosity and fun!
Keywords: Divisors of 554402273866106873733414, math, Factors of 554402273866106873733414, curriculum, school, college, exams, university, Prime factorization of 554402273866106873733414, STEM, science, technology, engineering, physics, economics, calculator, five hundred fifty-four sextillion, four hundred two quintillion, two hundred seventy-three quadrillion, eight hundred sixty-six trillion, one hundred six billion, eight hundred seventy-three million, seven hundred thirty-three thousand, four hundred fourteen.