11026547781852456
11,026,547,781,852,456 is an even composite number composed of eight prime numbers multiplied together.
What does the number 11026547781852456 look like?
This visualization shows the relationship between its 8 prime factors (large circles) and 2048 divisors.
11026547781852456 is an even composite number. It is composed of eight distinct prime numbers multiplied together. It has a total of two thousand and forty-eight divisors.
Prime factorization of 11026547781852456:
23 × 33 × 73 × 31 × 79 × 127 × 151 × 3169
(2 × 2 × 2 × 3 × 3 × 3 × 7 × 7 × 7 × 31 × 79 × 127 × 151 × 3169)See below for interesting mathematical facts about the number 11026547781852456 from the Numbermatics database.
Names of 11026547781852456
- Cardinal: 11026547781852456 can be written as Eleven quadrillion, twenty-six trillion, five hundred forty-seven billion, seven hundred eighty-one million, eight hundred fifty-two thousand, four hundred fifty-six.
Scientific notation
- Scientific notation: 1.1026547781852456 × 1016
Factors of 11026547781852456
Divisors of 11026547781852456
- Number of divisors d(n): 2048
-
Complete list of divisors:
1 2 3 4 6 7 8 9 12 14 18 21 24 27 28 31 36 42 49 54 56 62 63 72 79 84 93 98 108 124 126 127 147 151 158 168 186 189 196 216 217 237 248 252 254 279 294 302 316 343 372 378 381 392 434 441 453 474 504 508 553 558 588 604 632 651 686 711 744 756 762 837 868 882 889 906 948 1016 1029 1057 1106 1116 1143 1176 1208 1302 1323 1359 1372 1422 1512 1519 1524 1659 1674 1736 1764 1778 1812 1896 1953 2058 2114 2133 2212 2232 2286 2449 2604 2646 2667 2718 2744 2844 3038 3048 3087 3169 3171 3318 3348 3429 3528 3556 3624 3871 3906 3937 4077 4116 4228 4266 4424 4557 4572 4681 4898 4977 5208 5292 5334 5436 5688 5859 6076 6174 6223 6338 6342 6636 6696 6858 7112 7347 7399 7742 7812 7874 8001 8154 8232 8456 8532 9114 9144 9261 9362 9507 9513 9796 9954 10033 10584 10633 10668 10872 11613 11718 11811 11929 12152 12348 12446 12676 12684 13272 13671 13716 14043 14694 14798 14931 15484 15624 15748 16002 16308 17064 17143 18228 18522 18669 18724 19014 19026 19177 19592 19908 20066 21266 21336 22041 22183 22197 23226 23436 23622 23858 24003 24696 24892 25352 25368 27097 27342 27432 27559 28086 28521 28539 29388 29596 29862 30099 30968 31496 31899 32004 32616 32767 34286 34839 35433 35787 36456 37044 37338 37448 38028 38052 38354 39816 40132 41013 42129 42532 43561 44082 44366 44394 46452 46872 47244 47716 48006 49784 51429 51793 54194 54684 55118 56007 56172 57042 57078 57531 58776 59192 59724 60198 63798 64008 65534 66123 66549 66591 68572 69678 70231 70866 71574 74088 74676 76056 76104 76708 80264 81291 82026 82677 83503 84258 85064 85563 87122 88164 88732 88788 90297 92904 94488 95432 95697 96012 98239 98301 102858 103586 104517 106299 107361 108388 109368 110236 112014 112344 114084 114156 115062 119448 120001 120396 126387 127596 130683 131068 132246 133098 133182 134239 137144 139356 140462 141732 143148 149352 153416 154287 155281 155379 162582 164052 165354 167006 168021 168516 171126 172593 174244 176328 177464 177576 180594 191394 192024 192913 196478 196602 199647 199773 205716 207172 209034 210693 212598 214722 216776 220472 224028 228168 228312 229369 230124 240002 240792 243873 248031 250351 250509 252774 255192 261366 262136 264492 266196 266364 268478 270891 278712 280924 283464 286296 287091 294717 294903 308574 310562 310758 311023 322083 325164 328104 330708 334012 336042 337032 342252 345186 348488 360003 361188 369799 382788 385826 392049 392956 393204 399294 399546 402463 402717 411432 414344 418068 421386 425196 429444 448056 458738 460248 462861 465843 466137 478519 480004 487746 491617 496062 500702 501018 505548 517779 522732 528984 532392 532728 536956 541782 561848 574182 578739 584521 589434 589806 594487 598941 617148 621124 621516 622046 632079 644166 650328 661416 668024 672084 684504 687673 688107 690372 720006 722376 731619 739598 744093 751053 751527 765576 771652 784098 785912 786408 798588 799092 804926 805434 836136 840007 842772 850392 858888 884151 884709 917476 925722 931686 932274 933069 939673 957038 960008 975492 983234 992124 1001404 1002036 1011096 1035558 1045464 1073912 1080009 1083564 1086967 1109397 1148364 1157478 1169042 1176147 1178868 1179612 1188974 1197882 1207389 1208151 1234296 1242248 1243032 1244092 1264158 1288332 1344168 1350391 1375346 1376214 1380744 1397529 1398411 1435557 1440012 1463238 1474851 1479196 1488186 1502106 1503054 1514983 1543304 1568196 1597176 1598184 1605583 1609852 1610868 1680014 1685544 1736217 1752457 1753563 1768302 1769418 1783461 1834952 1851444 1863372 1864548 1866138 1879346 1896237 1914076 1950984 1966468 1984248 2002808 2004072 2063019 2064321 2071116 2160018 2167128 2173934 2177161 2218794 2253159 2254581 2296728 2314956 2338084 2352294 2357736 2359224 2377948 2395764 2414778 2416302 2488184 2520021 2528316 2576664 2588593 2652453 2700782 2750692 2752428 2795058 2796822 2799207 2817241 2819019 2871114 2880024 2926476 2949702 2958392 2976372 3004212 3006108 3029966 3136392 3211166 3219704 3221736 3240027 3260901 3328191 3349633 3360028 3441319 3472434 3504914 3507126 3536604 3538836 3566922 3622167 3624453 3702888 3726744 3729096 3732276 3758692 3792474 3828152 3932936 4051173 4091647 4126038 4128642 4142232 4161409 4192587 4306671 4320036 4347868 4354322 4424553 4437588 4506318 4509162 4544949 4629912 4676168 4704588 4755896 4791528 4813711 4816749 4829556 4832604 5040042 5056632 5177186 5208651 5257371 5260689 5304906 5350383 5401564 5501384 5504856 5590116 5593644 5598414 5634482 5638038 5742228 5852952 5899404 5952744 6008424 6012216 6059932 6189057 6192963 6422332 6480054 6521802 6531483 6577711 6656382 6699266 6720056 6759477 6882638 6944868 7009828 7014252 7073208 7077672 7133844 7244334 7248906 7464552 7517384 7560063 7584948 7760881 7765779 8102346 8183294 8252076 8257284 8322818 8385174 8397621 8451723 8457057 8613342 8640072 8695736 8708644 8849106 8875176 9012636 9018324 9089898 9409176 9627422 9633498 9659112 9665208 9782703 9984573 10048899 10080084 10323957 10354372 10417302 10514742 10521378 10604881 10609812 10700766 10803128 10866501 11180232 11187288 11196828 11268964 11276076 11484456 11798808 12119864 12153519 12267199 12274941 12378114 12385926 12476353 12484227 12844664 12920013 12960108 13043604 13062966 13155422 13273659 13312764 13398532 13518954 13634847 13765276 13889736 14019656 14028504 14267688 14441133 14450247 14488668 14497812 14834089 15120126 15169896 15240127 15521762 15531558 15772113 15782067 16051149 16204692 16366588 16504152 16514568 16645636 16770348 16795242 16903446 16914114 17226684 17417288 17698212 18025272 18036648 18120151 18179796 18567171 19254844 19266996 19565406 19594449 19720687 19733133 19969146 20097798 20160168 20647914 20708744 20834604 21029484 21042756 21209762 21219624 21401532 21733002 22393656 22537928 22552152 22680189 23282643 23297337 23447431 24307038 24534398 24549882 24756228 24771852 24952706 24968454 25355169 25371171 25840026 25920216 26087208 26125932 26310844 26547318 26625528 26797064 27037908 27269694 27530552 28882266 28900494 28977336 28995624 29129863 29348109 29668178 30146697 30240252 30480254 30971871 31043524 31063116 31544226 31564134 31794577 31814643 32102298 32409384 32733176 33291272 33540696 33590484 33695977 33806892 33828228 34453368 35396424 36240302 36359592 36460557 36801597 36824823 37134342 37429059 37452681 37803001 38509688 38533992 39130812 39188898 39441374 39466266 39938292 40195596 40904541 41295828 41669208 42058968 42085512 42419524 42803064 43323399 43350741 43466004 44502267 45360378 45720381 46565286 46594674 46894862 46964473 47316339 48614076 49068796 49099764 49512456 49543704 49905412 49936908 50710338 50742342 51680052 52251864 52621688 53094636 54075816 54326167 54360453 54539388 57764532 57800988 58259726 58696218 58783347 59162061 59199399 59336356 60293394 60480504 60771913 60960508 61943742 62087048 62126232 63088452 63128268 63589154 63629286 64204596 67180968 67391954 67613784 67656456 69847929 69892011 70342293 72480604 72921114 73603194 73649646 74234167 74268684 74858118 74905362 75606002 76065507 78261624 78377796 78882748 78932532 79876584 80391192 81809082 82591656 84839048 85870393 86646798 86701482 86932008 87334471 87389589 89004534 90440091 90720756 91440762 92915613 93130572 93189348 93789724 93928946 94632678 95383731 95443929 97228152 98137592 98199528 99810824 99873816 101087931 101420676 101484684 103360104 103838623 106189272 106680889 108652334 108720906 109078776 110404791 110474469 112287177 112358043 113409003 115529064 115601976 116519452 117392436 117566694 118324122 118398798 118672712 120586788 121543826 121921016 123887484 126176904 126256536 126841057 127178308 127258572 128409192 129970197 133506801 134783908 137161143 138044809 139695858 139784022 140684586 140893419 144961208 145842228 147206388 147299292 148468334 148537368 149716236 149810724 151212004 152131014 156755592 157765496 157865064 162978501 163081359 163618164 164132017 171740786 173293596 173402964 174668942 174779178 177486183 177598197 178009068 180880182 181441512 182315739 182881524 185831226 186261144 186378696 187579448 187857892 189265356 190767462 190887858 202175862 202841352 202969368 203909041 207677246 209543787 211026879 213361778 217304668 217441812 220809582 220948938 222562039 222702501 224574354 224716086 226818006 233038904 234784872 235133388 236648244 236797596 241173576 243087652 247774968 253682114 254356616 254517144 257611179 259940394 262003413 262168767 264621007 267013602 269567816 274322286 276089618 279391716 279568044 281369172 281786838 286151193 286331787 291684456 294412776 294598584 296936668 299432472 299621448 302424008 303263793 304262028 311515869 320042667 325957002 326162718 327236328 328264034 328751311 331214373 336861531 340227009 343481572 346587192 346805928 349337884 349558356 354972366 355196394 356018136 361760364 364631478 365763048 371662452 375715784 378530712 380283169 380523171 381534924 381775716 400520403 404351724 407818082 411483429 414134427 415354492 419087574 422053758 422680257 425403391 426723556 434609336 434883624 441619164 441897876 445124078 445405002 449148708 449432172 453636012 470266776 473296488 473595192 486175304 488935503 489244077 492396051 507364228 515222358 519639169 519880788 524006826 524337534 529242014 532458549 534027204 546947217 548644572 552179236 558783432 559136088 562738344 563573676 572302386 572663574 593873336 606527586 608524056 611341297 611727123 623031738 633080637 640085334 651914004 652325436 656528068 657502622 662428746 667686117 668107503 673723062 680454018 686963144 698675768 699116712 709944732 710392788 723520728 726870361 729262956 743324904 760566338 761046342 763069848 763551432 772833537 786010239 786506301 793863021 801040806 808703448 815636164 822966858 828268854 830708984 838175148 844107516 845360514 850806782 853447112 858453579 883238328 883795752 890248156 890810004 898297416 898864344 907272024 909791379 934547607 960128001 977871006 978488154 984792102 985631887 986253933 1014728456 1020681027 1030444716 1039278338 1039761576 1048013652 1048675068 1058484028 1064917098 1068054408 1093894434 1097289144 1104358472 1127147352 1140849507 1141569513 1144604772 1145327148 1171893031 1213055172 1222682594 1223454246 1242403281 1246063476 1266161274 1268040771 1276210173 1280170668 1303828008 1304650872 1313056136 1315005244 1324857492 1335372234 1336215006 1347446124 1360908036 1419889464 1420785576 1453740722 1458525912 1466806509 1477188153 1521132676 1522092684 1545667074 1557934273 1558917507 1572020478 1573012602 1587726042 1602081612 1631272328 1640841651 1645933716 1656537708 1676350296 1688215032 1690721028 1701613564 1716907158 1780496312 1781620008 1819582758 1834023891 1835181369 1852347049 1869095214 1883929303 1920256002 1955742012 1956976308 1969584204 1971263774 1972507866 2003058351 2004322509 2041362054 2060889432 2078556676 2096027304 2097350136 2116968056 2129834196 2180611083 2187788868 2281699014 2283139026 2289209544 2290654296 2301259177 2318500611 2343786062 2358030717 2381589063 2426110344 2445365188 2446908492 2484806562 2492126952 2532322548 2536081542 2552420346 2560341336 2630010488 2649714984 2661982183 2670744468 2672430012 2694892248 2721816072 2803642821 2880384003 2907481444 2933613018 2954376306 2956895661 2958761799 2977823737 3042265352 3044185368 3091334148 3115868546 3117835014 3144040956 3146025204 3175452084 3204163224 3281683302 3291867432 3313075416 3381442056 3403227128 3422548521 3424708539 3433814316 3515679093 3639165516 3668047782 3670362738 3704694098 3727209843 3738190428 3767858606 3828630519 3840512004 3911484024 3913952616 3939168408 3942527548 3945015732 4006116702 4008645018 4082724108 4157113352 4259668392 4279389079 4361222166 4375577736 4431564459 4563398028 4566278052 4602518354 4637001222 4673802819 4676752521 4687572124 4716061434 4763178126 4800981127 4890730376 4893816984 4969613124 5064645096 5072163084 5088092527 5104840692 5323964366 5341488936 5344860024 5502071673 5505544107 5557041147 5607285642 5651787909 5760768006 5814962888 5867226036 5908752612 5913791322 5917523598 5955647474 6009175053 6182668296 6231737092 6235670028 6288081912 6292050408 6350904168 6541833249 6563366604 6845097042 6849417078 6867628632 6899423209 6903777531 7031358186 7144767189 7278331032 7336095564 7340725476 7409388196 7454419686 7476380856 7535717212 7657261038 7681024008 7885055096 7890031464 7985946549 8012233404 8017290036 8165448216 8203251217 8558778158 8722444332 8863128918 8870686983 8876285397 8933471211 9126796056 9132556104 9205036708 9274002444 9347605638 9353505042 9375144248 9432122868 9526356252 9601962254 9939226248 10144326168 10176185054 10209681384 10267645563 10547037279 10647928732 10905539911 11004143346 11011088214 11114082294 11214571284 11303575818 11485891557 11521536012 11734452072 11817505224 11827582644 11835047196 11911294948 12018350106 12463474184 12471340056 12838167237 12966429343 13083666498 13126733208 13187505121 13690194084 13698834156 13798846418 13807555062 14021408457 14030257563 14062716372 14289534378 14402943381 14672191128 14681450952 14818776392 14908839372 15071434424 15264277581 15314522076 15971893098 16024466808 16034580072 16108814239 16406502434 16506215019 16671123441 16955363727 17117556316 17444888664 17726257836 17741373966 17752570794 17866942422 18410073416 18548004888 18695211276 18707010084 18864245736 19052712504 19203924508 19625499747 20352370108 20535291126 20698269627 20711332593 20844766159 21094074558 21295857464 21811079822 22008286692 22022176428 22228164588 22429142568 22607151636 22971783114 23043072024 23655165288 23670094392 23822589896 23957839647 24036700212 24609753651 25676334474 25932858686 26167332996 26375010242 26612060949 26800413633 27380388168 27397668312 27597692836 27615110124 28042816914 28060515126 28125432744 28579068756 28805886762 29817678744 30528555162 30629044152 31641111837 31943786196 32217628478 32716619733 32813004868 33012430038 33342246882 33606867889 33910727454 34235112632 35452515672 35482747932 35505141588 35733884844 37390422552 37414020168 38407849016 38514501711 38899288029 39250999494 39562515363 40704740216 41070582252 41396539254 41422665186 41689532318 42064225371 42188149116 43208830143 43622159644 44016573384 44044352856 44456329176 45214303272 45792832743 45943566228 47915679294 48073400424 48295962463 48326442717 49219507302 50013370323 50866091181 51352668948 51865717372 52334665992 52750020484 53224121898 53600827266 55195385672 55230220248 56085633828 56121030252 57158137512 57422758519 57611773524 61057110324 62094808881 62133997779 62534298477 63282223674 63887572392 64435256956 65433239466 65626009736 66024860076 66684493764 67213735778 67821454908 70965495864 71010283176 71467769688 71873518941 73829260953 77029003422 77798576058 78501998988 79125030726 80401240899 82141164504 82793078508 82845330372 83379064636 84128450742 84376298232 86417660286 87244319288 91585665486 91887132456 92312535847 95831358588 96591924926 96652885434 98149859199 98439014604 100026740646 100820603667 101732182362 102705337896 103731434744 105500040968 106448243796 107201654532 112171267656 112242060504 114845517038 115223547048 115543505133 116697864087 118687546089 122114220648 124189617762 124267995558 125068596954 126564447348 128870513912 129626490429 130866478932 132049720152 133368987528 134427471556 135642909816 137378498229 143747037882 144887887389 144979328151 147658521906 148830414937 154058006844 155597152116 157003997976 158250061452 160802481798 165586157016 165690660744 166758129272 168256901484 172268275557 172835320572 183171330972 184625071694 186284426643 187602895431 191662717176 193183849852 193305770868 196299718398 196878029208 200053481292 201641207334 203464364724 212896487592 214403309064 221487782859 229691034076 231087010266 233395728174 235248075223 237375092178 248379235524 248535991116 250137193908 253128894696 259252980858 261732957864 268854943112 274756996458 276937607541 287494075764 289775774778 289958656302 294449577597 295317043812 297660829874 302461811001 308116013688 311194304232 316500122904 321604963596 336513802968 338071737241 344536551114 345670641144 350093592261 356062638267 366342661944 369250143388 372568853286 375205790862 386367699704 386611541736 392599436796 400106962584 401959309633 403282414668 406928729448 434663662167 434937984453 442975565718 446491244811 459382068152 462174020532 466791456348 470496150446 474750184356 496758471048 497071982232 500274387816 516804826671 518505961716 549513992916 553875215082 562808686293 574988151528 579551549556 579917312604 588899155194 590634087624 595321659748 604923622002 643209927192 646187750929 676143474482 689073102228 700187184522 705744225669 712125276534 738500286776 745137706572 750411581724 785198873592 803918619266 806564829336 830812822623 869327324334 869875968906 885951131436 892982489622 907385433003 924348041064 933582912696 940992300892 949500368712 1014215211723 1033609653342 1037011923432 1041812904559 1099027985832 1107750430164 1125617372586 1159103099112 1159834625208 1177798310388 1190643319496 1205877928899 1209847244004 1292375501858 1303990986501 1339473734433 1352286948964 1378146204456 1400374369044 1411488451338 1424250553068 1490275413144 1500823163448 1550414480013 1607837238532 1646736526561 1661625645246 1738654648668 1739751937812 1771902262872 1785964979244 1814770866006 1881984601784 1938563252787 2028430423446 2067219306684 2083625809118 2117232677007 2215500860328 2251234745172 2355596620776 2411755857798 2419694488008 2492438467869 2584751003716 2607981973002 2678947468866 2704573897928 2800748738088 2822976902676 2848501106136 3042645635169 3100828960026 3125438713677 3215674477064 3293473053122 3323251290492 3477309297336 3479503875624 3571929958488 3617633786697 3629541732012 3877126505574 4018421203299 4056860846892 4134438613368 4167251618236 4234465354014 4502469490344 4823511715596 4940209579683 4984876935738 5169502007432 5215963946004 5357894937732 5645953805352 5815689758361 6085291270338 6201657920052 6250877427354 6351698031021 6586946106244 6646502580984 7235267573394 7259083464024 7292690331913 7754253011148 8036842406598 8113721693784 8334503236472 8468930708028 9127936905507 9376316141031 9647023431192 9880419159366 9969753871476 10431927892008 10715789875464 10852901360091 11631379516722 12170582540676 12403315840104 12501754854708 12703396062042 13173892212488 14470535146788 14585380663826 14820628739049 15508506022296 16073684813196 16937861416056 17447069275083 18255873811014 18752632282062 19760838318732 19939507742952 21705802720182 21878070995739 23262759033444 24341165081352 25003509709416 25406792124084 28128948423093 28941070293576 29170761327652 29641257478098 32147369626392 34894138550166 36511747622028 37505264564124 39521676637464 43411605440364 43756141991478 44461886217147 46525518066888 50813584248168 51048832323391 56257896846186 58341522655304 59282514956196 65634212987217 69788277100332 73023495244056 75010529128248 86823210880728 87512283982956 88923772434294 102097664646782 112515793692372 118565029912392 131268425974434 139576554200664 153146496970173 175024567965912 177847544868588 196902638961651 204195329293564 225031587384744 262536851948868 306292993940346 355695089737176 393805277923302 408390658587128 459439490910519 525073703897736 612585987880692 787610555846604 918878981821038 1225171975761384 1378318472731557 1575221111693208 1837757963642076 2756636945463114 3675515927284152 5513273890926228 11026547781852456
- Sum of all divisors σ(n): 37893439488000000
- Sum of proper divisors (its aliquot sum) s(n): 26866891706147544
- 11026547781852456 is an abundant number, because the sum of its proper divisors (26866891706147544) is greater than itself. Its abundance is 15840343924295088
Bases of 11026547781852456
- Binary: 1001110010110010010110001101111010001011011101001010002
- Hexadecimal: 0x272C9637A2DD28
- Base-36: 30KL24CAD60
Squares and roots of 11026547781852456
- 11026547781852456 squared (110265477818524562) is 121584755985475317592126953231936
- 11026547781852456 cubed (110265477818524563) is 1340660121418714986174092066563208853178299234816
-
The
square root of 11026547781852456 is 105007370.1311124923 -
The
cube root of 11026547781852456 is 222576.7796753487
Scales and comparisons
How big is 11026547781852456?- 11,026,547,781,852,456 seconds is equal to 350,610,112 years, 5 weeks, 5 days, 11 hours, 27 minutes, 36 seconds.
-
To count from 1 to 11,026,547,781,852,456 would take you about one billion, fifty-one million, eight hundred thirty thousand, three hundred thirty-six 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 11026547781852456 cubic inches would be around 18548.1 feet tall.
Recreational maths with 11026547781852456
- 11026547781852456 backwards is 65425818774562011
- 11026547781852456 is a
Harshad number . - The number of decimal digits it has is: 17
- The sum of 11026547781852456's digits is 72
- 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 11026547781852456 - Facts about the integer". Numbermatics.com. 2024. Web. 24 June 2024.
APA style:
Numbermatics. (2024). Number 11026547781852456 - Facts about the integer. Retrieved 24 June 2024, from https://numbermatics.com/n/11026547781852456/
Chicago style:
Numbermatics. 2024. "Number 11026547781852456 - Facts about the integer". https://numbermatics.com/n/11026547781852456/
The information we have on file for 11026547781852456 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 11026547781852456, math, Factors of 11026547781852456, curriculum, school, college, exams, university, Prime factorization of 11026547781852456, STEM, science, technology, engineering, physics, economics, calculator, eleven quadrillion, twenty-six trillion, five hundred forty-seven billion, seven hundred eighty-one million, eight hundred fifty-two thousand, four hundred fifty-six.