2850304692602250
2,850,304,692,602,250 is an even composite number composed of seven prime numbers multiplied together.
2850304692602250 is an even composite number. It is composed of seven distinct prime numbers multiplied together. It has a total of two thousand, one hundred twelve divisors.
Prime factorization of 2850304692602250:
2 × 310 × 53 × 132 × 19 × 157 × 383
(2 × 3 × 3 × 3 × 3 × 3 × 3 × 3 × 3 × 3 × 3 × 5 × 5 × 5 × 13 × 13 × 19 × 157 × 383)See below for interesting mathematical facts about the number 2850304692602250 from the Numbermatics database.
Names of 2850304692602250
- Cardinal: 2850304692602250 can be written as Two quadrillion, eight hundred fifty trillion, three hundred four billion, six hundred ninety-two million, six hundred two thousand, two hundred fifty.
Scientific notation
- Scientific notation: 2.85030469260225 × 1015
Factors of 2850304692602250
Divisors of 2850304692602250
- Number of divisors d(n): 2112
-
Complete list of divisors:
1 2 3 5 6 9 10 13 15 18 19 25 26 27 30 38 39 45 50 54 57 65 75 78 81 90 95 114 117 125 130 135 150 157 162 169 171 190 195 225 234 243 247 250 270 285 314 325 338 342 351 375 383 390 405 450 471 475 486 494 507 513 570 585 650 675 702 729 741 750 766 785 810 845 855 942 950 975 1014 1026 1053 1125 1149 1170 1215 1235 1350 1413 1425 1458 1482 1521 1539 1570 1625 1690 1710 1755 1915 1950 2025 2041 2106 2187 2223 2250 2298 2355 2375 2430 2470 2535 2565 2826 2850 2925 2983 3042 3078 3159 3211 3250 3375 3447 3510 3645 3705 3830 3925 4050 4082 4225 4239 4275 4374 4446 4563 4617 4710 4750 4875 4979 5070 5130 5265 5745 5850 5966 6075 6123 6175 6318 6422 6561 6669 6750 6894 7065 7125 7277 7290 7410 7605 7695 7850 8450 8478 8550 8775 8949 9126 9234 9477 9575 9633 9750 9958 10125 10205 10341 10530 10935 11115 11490 11775 12150 12246 12350 12675 12717 12825 13122 13338 13689 13851 14130 14250 14554 14625 14915 14937 15210 15390 15795 16055 17235 17550 17898 18225 18369 18525 18954 19150 19266 19625 19683 20007 20250 20410 20682 21125 21195 21375 21831 21870 22230 22815 23085 23550 24895 25350 25434 25650 26325 26533 26847 27378 27702 28431 28725 28899 29250 29830 29874 30375 30615 30875 31023 31590 32110 32805 33345 34470 35325 36385 36450 36738 37050 38025 38151 38475 38779 39250 39366 40014 41067 41553 42250 42390 42750 43662 43875 44745 44811 45630 46170 47385 47875 48165 49790 51025 51705 52650 53066 53694 54675 55107 55575 56862 57450 57798 58875 59049 60021 60131 60750 61230 61750 62046 63375 63585 64125 64727 65493 65610 66690 68445 69255 70650 72770 74575 74685 76050 76302 76950 77558 78975 79599 80275 80541 82134 83106 85293 86175 86697 87750 89490 89622 91125 91845 92625 93069 94601 94770 95750 96330 98415 100035 102050 103410 105975 109155 109350 110214 111150 114075 114453 115425 116337 117750 118098 120042 120262 123201 124475 124659 126750 127170 128250 129454 130986 131625 132665 134235 134433 136890 138510 142155 143625 144495 149150 149370 153075 155115 157950 159198 160550 161082 164025 165321 166725 170586 172350 173394 176625 180063 180393 181925 182250 183690 185250 186138 189202 190125 190755 192375 193895 194181 196479 196830 200070 205335 207765 211950 218310 223725 224055 228150 228906 230850 232674 236925 238797 240825 241623 246402 248950 249318 255125 255879 258525 260091 263250 265330 268470 268866 273375 275535 277875 279207 283803 284310 287250 288990 295245 300105 300655 306150 310230 317925 323635 327465 328050 330642 333450 342225 343359 346275 349011 353250 360126 360786 363850 369603 372875 373425 373977 380250 381510 384750 387790 388362 392958 394875 397995 401375 402705 403299 410670 415530 426465 430875 433485 447450 448110 459225 465345 473005 473850 477594 481650 483246 492075 495963 500175 504127 510250 511758 517050 520182 529875 540189 541179 545775 546750 551070 555750 558414 567606 570375 572265 577125 581685 582543 589437 590490 600210 601310 616005 622375 623295 635850 647270 654930 663325 671175 672165 684450 686718 692550 698022 710775 716391 722475 724869 739206 745750 746850 747954 765375 767637 775575 780273 781703 789750 795990 802750 805410 806598 820125 826605 833625 837621 851409 852930 861750 866970 900315 901965 909625 918450 930690 946010 953775 969475 970905 982395 984150 991926 1000350 1008254 1026675 1030077 1038825 1047033 1059750 1080378 1082358 1091550 1108809 1118625 1120275 1121931 1140750 1142489 1144530 1154250 1163370 1165086 1178874 1184625 1193985 1204125 1208115 1209897 1229813 1232010 1244750 1246590 1279395 1292625 1300455 1326650 1342350 1344330 1377675 1396035 1419015 1421550 1432782 1444950 1449738 1476225 1487889 1500525 1503275 1512381 1530750 1535274 1551150 1560546 1563406 1589625 1618175 1620567 1623537 1637325 1640250 1653210 1667250 1675242 1702818 1711125 1716795 1731375 1745055 1747629 1768311 1800630 1803930 1819250 1848015 1867125 1869885 1907550 1938950 1941810 1964790 1989975 2013525 2016495 2053350 2060154 2077650 2094066 2132325 2149173 2167425 2174607 2217618 2237250 2240550 2243862 2284978 2296125 2326725 2340819 2345109 2365025 2369250 2387970 2408250 2416230 2419794 2459626 2460375 2479815 2500875 2512863 2520635 2554227 2558790 2585250 2600910 2700945 2705895 2728875 2755350 2792070 2838030 2861325 2908425 2912715 2947185 2952450 2975778 3001050 3006550 3024762 3080025 3090231 3116475 3141099 3179250 3236350 3241134 3247074 3274650 3316625 3326427 3355875 3360825 3422250 3427467 3433590 3462750 3490110 3495258 3536622 3553875 3581955 3612375 3624345 3629691 3689439 3696030 3734250 3739770 3838185 3877875 3901365 3908515 3979950 4027050 4032990 4133025 4188105 4257045 4264650 4298346 4334850 4349214 4463667 4501575 4509825 4537143 4592250 4653450 4681638 4690218 4730050 4768875 4847375 4854525 4861701 4870611 4911975 4920750 4959630 5001750 5025726 5041270 5108454 5133375 5150385 5194125 5235165 5242887 5304933 5401890 5411790 5457750 5544045 5601375 5609655 5712445 5722650 5816850 5825430 5894370 5969925 6040575 6049485 6149065 6160050 6180462 6232950 6282198 6396975 6447519 6502275 6523821 6633250 6652854 6711750 6721650 6854934 6888375 6980175 7022457 7035327 7095075 7107750 7163910 7224750 7248690 7259382 7378878 7381125 7439445 7502625 7516375 7538589 7561905 7662681 7676370 7755750 7802730 7817030 8090875 8102835 8117685 8186625 8266050 8376210 8514090 8583975 8725275 8738145 8841555 8927334 9003150 9019650 9074286 9240075 9270693 9349425 9423297 9537750 9694750 9709050 9723402 9741222 9823950 9949875 9979281 10067625 10082475 10162139 10266750 10282401 10300770 10388250 10470330 10485774 10609866 10661625 10745865 10837125 10873035 10889073 11068317 11088090 11202750 11219310 11424890 11633625 11704095 11725545 11825125 11939850 12081150 12098970 12298130 12399075 12564315 12603175 12771135 12793950 12895038 13004550 13047642 13391001 13504725 13529475 13611429 13776750 13960350 14044914 14070654 14190150 14306625 14542125 14563575 14585103 14611833 14735925 14762250 14852357 14878890 15005250 15032750 15077178 15123810 15325362 15400125 15451155 15582375 15705495 15728661 15914799 16181750 16205670 16235370 16373250 16632135 16804125 17137335 17167950 17450550 17476290 17683110 17909775 18121725 18148455 18447195 18480150 18541386 18698850 18846594 19190925 19342557 19506825 19542575 19571463 19899750 19958562 20135250 20164950 20324278 20564802 20665125 20940525 21067371 21105981 21285225 21323250 21491730 21674250 21746070 21778146 22136634 22318335 22507875 22549125 22615767 22685715 22988043 23267250 23408190 23451090 23650250 24272625 24308505 24353055 24559875 24798150 25128630 25206350 25542270 25751925 26175825 26214435 26524665 26782002 27009450 27058950 27222858 27720225 28048275 28269891 28562225 28613250 29084250 29127150 29170206 29223666 29471850 29704714 29849625 30202875 30247425 30486417 30745325 30800250 30847203 30902310 31164750 31410990 31457322 31829598 31984875 32237595 32511375 32619105 32667219 33204951 33264270 33608250 34274670 34900875 35112285 35176635 35475375 35819550 36243450 36296910 36894390 37197225 37692945 37809525 38313405 38381850 38685114 39013650 39085150 39142926 40173003 40514175 40588425 40834287 41330250 41881050 42134742 42211962 42570450 42919875 43626375 43690725 43835499 44207775 44557071 44636670 45015750 45098250 45231534 45371430 45976086 46200375 46353465 46747125 47116485 47185983 47744397 48545250 48617010 48706110 49119750 49896405 50412375 50810695 51412005 51503850 52351650 52428870 53049330 53729325 54365175 54445365 55341585 55440450 56096550 56539782 57124450 58027671 58520475 58627725 58714389 59699250 60405750 60494850 60972834 61490650 61694406 61995375 62821575 63015875 63202113 63317943 63855675 63969750 64475190 65022750 65238210 65334438 66409902 66955005 67523625 67647375 68057145 68964129 69801750 70224570 70353270 70950750 72817875 72925515 73059165 73679625 74261785 74394450 75385890 75619050 76626810 77255775 78527475 78643305 79573995 80346006 81028350 81176850 81668574 83160675 84809673 85686675 85839750 87252750 87381450 87670998 88415550 89114142 89548875 90608625 90742275 91459251 92235975 92400750 92541609 92706930 93494250 94232970 94371966 95488794 95954625 96712785 97534125 97712875 97857315 98001657 99614853 99792810 100824750 101621390 102824010 104702625 105336855 105529905 106426125 107458650 108730350 108890730 110683170 111591675 113078835 113428575 114940215 116055342 117040950 117255450 117428778 120519009 121542525 121765275 122502861 123990750 125643150 126031750 126404226 126635886 127711350 128759625 130879125 131072175 131506497 132623325 133671213 133910010 135047250 135294750 136114290 137928258 138601125 140241375 141349455 141557949 142811125 143233191 145635750 145851030 146118330 147359250 148523570 151237125 152432085 153726625 154236015 154511550 157054950 157286610 159147990 161187975 163095525 163336095 166024755 166321350 169619346 171373350 174083013 175561425 175883175 176143167 179097750 181217250 181484550 182918502 184471950 185083218 185986125 188464725 189047625 189606339 189953829 191567025 191909250 193080641 193425570 195068250 195425750 195714630 196003314 199229706 200865015 202570875 202942125 204171435 206892387 209405250 210673710 211059810 212852250 218453625 219177495 221038875 222785355 223183350 226157670 226857150 229880430 231767325 235582425 235929915 238721985 241038018 243085050 243530550 245005722 249482025 254053475 254429019 257060025 257519250 261758250 262144350 263012994 265246650 267342426 268646625 271825875 272226825 274377753 276707925 277202250 277624827 280482750 282698910 283115898 285622250 286466382 290138355 292602375 293138625 293571945 294004971 298844559 302474250 304864170 307453250 308472030 314107875 316010565 316589715 319278375 322375950 326191050 326672190 332049510 334775025 340285725 344820645 348166026 351122850 351766350 352286334 364627575 365295825 367508583 371308925 371972250 376929450 378095250 379212678 379907658 383134050 386161282 386278875 392637375 393216525 394519491 397869975 401013639 401730030 405141750 405884250 408342870 413784774 415803375 424048365 424673847 428433375 429699573 436907250 438354990 442077750 445570710 453711375 457296255 461179875 462708045 463534650 471164850 471859830 477443970 483563925 489286575 490008285 498074265 498964050 508106950 508858038 514120050 522249039 526684275 527649525 537293250 543651750 544453650 548755506 553415850 555249654 557958375 565394175 567142875 569861487 574701075 579241923 580276710 585204750 586277250 587143890 588009942 597689118 602595045 607712625 608826375 612514305 620677161 628215750 632021130 633179430 638556750 655360875 657532485 663116625 668356065 669550050 680571450 689641290 706747275 707789745 716165955 729255150 730591650 735017166 742617850 762160425 763287057 771180075 772557750 785274750 786433050 789038982 795739950 802027278 805939875 815477625 816680475 823133259 830123775 831606750 832874481 848096730 849347694 856866750 859399146 870415065 877807125 879415875 880715835 896533677 907422750 914592510 922359750 925416090 942323625 948031695 949769145 957835125 965403205 967127850 978573150 980016570 996148530 1004325075 1020857175 1034461935 1044498078 1053368550 1055299050 1095887475 1102525749 1113926775 1115916750 1130788350 1134285750 1139722974 1149402150 1158483846 1158836625 1177912125 1179649575 1183558473 1193609925 1203040917 1205190090 1215425250 1217652750 1225028610 1241354322 1247410125 1270267375 1272145095 1274021541 1285300125 1310721750 1315064970 1326233250 1336712130 1361134125 1371888765 1383539625 1388124135 1413494550 1415579490 1432331910 1450691775 1467859725 1470024855 1494222795 1524320850 1526574114 1542360150 1566747117 1580052825 1582948575 1611879750 1630955250 1633360950 1646266518 1660247550 1665748962 1673875125 1701428625 1709584461 1724103225 1737725769 1740830130 1755614250 1758831750 1761431670 1793067354 1823137875 1826479125 1837542915 1856544625 1862031483 1884647250 1896063390 1899538290 1915670250 1930806410 1966082625 1972597455 1989349875 2005068195 2008650150 2041714350 2068923870 2120241825 2123369235 2148497865 2191774950 2205051498 2227853550 2286481275 2289861171 2313540225 2317673250 2355824250 2359299150 2367116946 2387219850 2406081834 2417819625 2446432875 2450041425 2469399777 2490371325 2494820250 2498623443 2540534750 2544290190 2548043082 2570600250 2611245195 2633421375 2638247625 2689601031 2722268250 2743777530 2767079250 2776248270 2826970875 2849307435 2873505375 2896209615 2901383550 2935719450 2940049710 2988445590 3012975225 3062571525 3103385805 3133494234 3160105650 3165897150 3287662425 3307577247 3341780325 3347750250 3402857250 3419168922 3448206450 3475451538 3533736375 3538948725 3550675419 3580829775 3609122751 3646275750 3652958250 3675085830 3713089250 3724062966 3810802125 3816435285 3822064623 3855900375 3932165250 3945194910 3978699750 4010136390 4083402375 4115666295 4150618875 4164372405 4240483650 4246738470 4296995730 4352075325 4403579175 4482668385 4572962550 4579722342 4627080450 4740158475 4748845725 4827016025 4835639250 4892865750 4900082850 4938799554 4980742650 4997246886 5021625375 5104285875 5128753383 5172309675 5213177307 5222490390 5266842750 5276495250 5379202062 5479437375 5512628745 5569633875 5586094449 5653941750 5698614870 5747010750 5792419230 5898247875 5917792365 5968049625 6015204585 6025950450 6125143050 6206771610 6360725475 6370107705 6575324850 6615154494 6683560650 6859443825 6940620675 7067472750 7077897450 7101350838 7161659550 7218245502 7253458875 7339298625 7350124275 7408199331 7471113975 7495870329 7621604250 7632870570 7644129246 7711800750 7833735585 7900264125 7914742875 8068803093 8166804750 8231332590 8301237750 8328744810 8547922305 8620516125 8688628845 8704150650 8807158350 8965336770 9187714575 9310157415 9480316950 9497691450 9654032050 9862987275 9922731741 10025340975 10043250750 10208571750 10257506766 10344619350 10426354614 10601209125 10616846175 10742489325 10827368253 10958874750 11025257490 11139267750 11172188898 11432406375 11449305855 11567701125 11796495750 11835584730 11936099250 12030409170 12250207125 12346998885 12451856625 12493117215 12721450950 12740215410 13056225975 13448005155 13718887650 13881241350 14246537175 14481048075 14506917750 14678597250 14700248550 14816398662 14942227950 14991740658 15064876125 15312857625 15386260149 15516929025 15639531921 15667471170 15800528250 15829485750 16137606186 16438312125 16537886235 16708901625 17095844610 17241032250 17377257690 17694743625 17753377095 17904148875 18045613755 18375429150 18620314830 19082176425 19110323115 19725974550 19845463482 20050681950 20578331475 20821862025 21202418250 21233692350 21484978650 21654736506 21760376625 22017895875 22224597993 22413341925 22487610987 22864812750 22898611710 23135402250 23700792375 23744228625 24135080125 24206409279 24500414250 24693997770 24903713250 24986234430 25643766915 25861548375 26065886535 26112451950 26896010310 27563143725 27930472245 28493074350 28962096150 29588961825 29768195223 30076022925 30129752250 30625715250 30772520298 31033858050 31279063842 31803627375 31850538525 32482104759 32876624250 33075772470 33417803250 34297219125 34703103375 35389487250 35506754190 35808297750 36091227510 36750621375 37040996655 37355569875 37479351645 38164352850 38220646230 39168677925 40344015465 41156662950 41643724050 42739611525 43443144225 43520753250 44035791750 44449195986 44826683850 44975221974 45938572875 46158780447 46550787075 46918595763 47401584750 47488457250 48270160250 48412818558 49314936375 49613658705 50126704875 51287533830 51723096750 52131773070 53084230875 53712446625 54136841265 55126287450 55860944490 57246529275 59177923650 59536390446 60152045850 61734994425 62465586075 63607254750 63701077050 64964209518 65281129875 66673793979 67240025775 67462832961 68594438250 69406206750 71232685875 72405240375 72619227837 73501242750 74081993310 74711139750 74958703290 76931300745 77584645125 78197659605 78337355850 80688030930 82689431175 85479223050 86886288450 88766885475 90228068775 91877145750 92317560894 93101574150 93837191526 95410882125 95551615575 97446314277 98629872750 99227317410 100253409750 102891657375 104109310125 106168461750 107424893250 108273682530 111122989965 112066709625 112438054935 114493058550 121032046395 123469988850 124931172150 128218834575 130329432675 130562259750 133347587958 134480051550 134925665922 137815718625 139652361225 140755787289 142465371750 144810480750 145238455674 147944809125 148840976115 150380114625 153862601490 155169290250 156395319210 159252692625 162410523795 165378862350 177533770950 180456137550 185204983275 187396758225 190821764250 191103231150 194892628554 195843389625 200021381937 201720077325 205783314750 208218620250 213698057625 217215721125 222245979930 224133419250 224876109870 230793902235 232753935375 234592978815 242064092790 248068293525 256437669150 260658865350 270684206325 275631437250 279304722450 281511574578 286232646375 292338942831 295889618250 297681952230 300760229250 308674972125 312327930375 318505385250 324821047590 333368969895 336200128875 337314164805 363096139185 370409966550 374793516450 384656503725 390988298025 391686779250 400042763874 403440154650 413447155875 422267361867 427396115250 434431442250 443834427375 451140343875 461587804470 465507870750 469185957630 477758077875 487231571385 496136587050 541368412650 555614949825 562190274675 572465292750 584677885662 600064145811 605160231975 617349944250 624655860750 641094172875 651647163375 666737939790 672400257750 674628329610 698261806125 703778936445 726192278370 744204880575 769313007450 781976596050 812052618975 826894311750 844534723734 877016828493 887668854750 902280687750 926024916375 936983791125 955516155750 974463142770 1000106909685 1008600386625 1111229899650 1124380549350 1153969511175 1172964894075 1200128291622 1210320463950 1240341467625 1266802085601 1282188345750 1303294326750 1353421031625 1396523612250 1407557872890 1461694714155 1488409761150 1624105237950 1666844849475 1686570824025 1754033656986 1815480695925 1852049832750 1873967582250 1923282518625 1954941490125 2000213819370 2017200773250 2111336809335 2307939022350 2345929788150 2436157856925 2480682935250 2533604171202 2706842063250 2778074749125 2810951373375 2923389428310 3000320729055 3025801159875 3333689698950 3373141648050 3518894682225 3630961391850 3721024402875 3800406256803 3846565037250 3909882980250 4060263094875 4222673618670 4385084142465 4872315713850 5000534548425 5556149498250 5621902746750 5769847555875 5864824470375 6000641458110 6051602319750 6334010428005 7037789364450 7308473570775 7442048805750 7600812513606 8120526189750 8334224247375 8432854120125 8770168284930 9077403479625 10001069096850 10556684046675 11401218770409 11539695111750 11729648940750 12180789284625 12668020856010 14616947141550 15001603645275 16668448494750 16865708240250 17594473411125 18154806959250 19002031284015 21113368093350 21925420712325 22802437540818 24361578569250 25002672742125 30003207290550 31670052140025 35188946822250 36542367853875 38004062568030 43850841424650 50005345484250 52783420233375 57006093852045 63340104280050 73084735707750 75008018226375 95010156420075 105566840466750 109627103561625 114012187704090 150016036452750 158350260700125 190020312840150 219254207123250 285030469260225 316700521400250 475050782100375 570060938520450 950101564200750 1425152346301125 2850304692602250
- Sum of all divisors σ(n): 9204847640801280
- Sum of proper divisors (its aliquot sum) s(n): 6354542948199030
- 2850304692602250 is an abundant number, because the sum of its proper divisors (6354542948199030) is greater than itself. Its abundance is 3504238255596780
Bases of 2850304692602250
- Binary: 10100010000001010110010001101011010001000101100010102
- Hexadecimal: 0xA205646B4458A
- Base-36: S2CJWDAEMI
Squares and roots of 2850304692602250
- 2850304692602250 squared (28503046926022502) is 8124236840670406865876705062500
- 2850304692602250 cubed (28503046926022503) is 23156550390774938752651139668118148873890625000
-
The
square root of 2850304692602250 is 53388244.8915699981 -
The
cube root of 2850304692602250 is 141785.0462732201
Scales and comparisons
How big is 2850304692602250?- 2,850,304,692,602,250 seconds is equal to 90,630,872 years, 33 weeks, 6 days, 20 hours, 37 minutes, 30 seconds.
-
To count from 1 to 2,850,304,692,602,250 would take you about two hundred seventy-one million, eight hundred ninety-two thousand, six hundred seventeen 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 2850304692602250 cubic inches would be around 11815.4 feet tall.
Recreational maths with 2850304692602250
- 2850304692602250 backwards is 0522062964030582
- 2850304692602250 is a
Harshad number . - The number of decimal digits it has is: 16
- The sum of 2850304692602250's digits is 54
- 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 2850304692602250 - Facts about the integer". Numbermatics.com. 2024. Web. 23 May 2024.
APA style:
Numbermatics. (2024). Number 2850304692602250 - Facts about the integer. Retrieved 23 May 2024, from https://numbermatics.com/n/2850304692602250/
Chicago style:
Numbermatics. 2024. "Number 2850304692602250 - Facts about the integer". https://numbermatics.com/n/2850304692602250/
The information we have on file for 2850304692602250 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 2850304692602250, math, Factors of 2850304692602250, curriculum, school, college, exams, university, Prime factorization of 2850304692602250, STEM, science, technology, engineering, physics, economics, calculator, two quadrillion, eight hundred fifty trillion, three hundred four billion, six hundred ninety-two million, six hundred two thousand, two hundred fifty.