249420581821645272
249,420,581,821,645,272 is an even composite number composed of seven prime numbers multiplied together.
What does the number 249420581821645272 look like?
This visualization shows the relationship between its 7 prime factors (large circles) and 1944 divisors.
249420581821645272 is an even composite number. It is composed of seven distinct prime numbers multiplied together. It has a total of one thousand, nine hundred forty-four divisors.
Prime factorization of 249420581821645272:
23 × 32 × 172 × 19 × 292 × 612 × 4492
(2 × 2 × 2 × 3 × 3 × 17 × 17 × 19 × 29 × 29 × 61 × 61 × 449 × 449)See below for interesting mathematical facts about the number 249420581821645272 from the Numbermatics database.
Names of 249420581821645272
- Cardinal: 249420581821645272 can be written as Two hundred forty-nine quadrillion, four hundred twenty trillion, five hundred eighty-one billion, eight hundred twenty-one million, six hundred forty-five thousand, two hundred seventy-two.
Scientific notation
- Scientific notation: 2.49420581821645272 × 1017
Factors of 249420581821645272
Divisors of 249420581821645272
- Number of divisors d(n): 1944
-
Complete list of divisors:
1 2 3 4 6 8 9 12 17 18 19 24 29 34 36 38 51 57 58 61 68 72 76 87 102 114 116 122 136 152 153 171 174 183 204 228 232 244 261 289 306 323 342 348 366 408 449 456 488 493 522 549 551 578 612 646 684 696 732 841 867 898 969 986 1037 1044 1098 1102 1156 1159 1224 1292 1347 1368 1464 1479 1653 1682 1734 1769 1796 1938 1972 2074 2088 2196 2204 2312 2318 2523 2584 2601 2694 2907 2958 3111 3306 3364 3468 3477 3538 3592 3721 3876 3944 4041 4148 4392 4408 4437 4636 4959 5046 5202 5307 5388 5491 5814 5916 6222 6612 6728 6936 6954 7076 7442 7569 7633 7752 8082 8296 8381 8531 8874 9272 9333 9367 9918 10092 10404 10431 10614 10776 10982 11163 11628 11832 12444 13021 13224 13908 14152 14297 14884 15138 15266 15921 15979 16164 16473 16762 17062 17629 17748 18666 18734 19703 19836 20184 20808 20862 21228 21964 22326 22899 23256 24888 25143 25593 26042 27389 27816 28101 28594 29768 30073 30276 30532 31842 31958 32328 32946 33489 33524 33611 34124 35258 35496 37332 37468 39063 39406 39672 41724 42456 42891 43928 44652 45798 47937 49419 50286 51186 51301 52084 52887 54778 56202 57188 59109 60146 60552 61064 63257 63684 63916 65892 66978 67048 67222 68248 68697 70516 70699 74664 74936 75429 76779 78126 78812 82167 83448 84303 85782 89304 90219 91596 95874 98838 100572 100833 102372 102602 104168 105774 107909 109556 112404 114376 117189 118218 120292 126514 127368 127832 128673 129761 131784 133956 134444 137394 141032 141398 143811 145027 150858 153558 153903 156252 157624 158661 159239 164334 168606 171564 177327 180438 183192 189771 191748 197676 201144 201601 201666 204744 205204 211548 212097 215818 219112 221357 224808 234378 236436 240584 243049 246501 247399 253028 257346 259522 267912 268888 270657 271643 274788 282796 287622 290054 301716 302499 307116 307806 312504 317322 318478 323727 328668 334951 337212 343128 354654 360876 377609 379542 383496 389283 395352 403202 403332 410408 423096 424194 431636 435081 442714 461709 465613 468756 472872 477717 486098 493002 494798 506056 511241 514692 519044 520391 541314 543286 549576 565592 569313 571387 575244 580108 603432 604803 604998 614232 615612 634644 636291 636956 647454 657336 664071 669902 674424 709308 721752 729147 742197 755218 759084 778566 794281 806404 806664 814929 848388 863272 870162 872117 885428 923418 931226 937512 955434 971181 972196 974719 986004 989596 1004853 1022482 1029384 1038088 1040782 1075369 1082628 1086572 1132827 1138626 1142774 1150488 1160216 1167849 1201883 1209606 1209996 1231224 1269288 1272582 1273912 1294908 1305243 1328142 1339804 1396839 1418616 1433151 1458294 1484394 1510436 1518168 1533723 1557132 1561173 1588562 1612808 1629858 1670729 1696776 1714161 1740324 1744234 1770856 1814409 1834453 1846836 1862452 1910868 1942362 1944392 1949438 1972008 1979192 1992213 2009706 2044964 2050271 2081564 2150738 2165256 2173144 2187441 2226591 2265654 2277252 2285548 2335698 2382843 2403766 2419212 2419992 2444787 2465459 2545164 2589816 2610486 2616351 2656284 2679608 2793678 2866302 2916588 2924157 2968788 3014559 3020872 3067446 3114264 3122346 3129361 3177124 3226107 3259716 3341458 3398481 3427217 3428322 3480648 3488468 3605649 3628818 3668906 3693672 3724904 3763069 3821736 3830419 3884724 3898876 3984426 4019412 4089928 4100542 4163128 4190517 4205783 4301476 4374882 4453182 4531308 4554504 4571096 4601169 4617931 4671396 4683519 4765686 4807532 4838424 4889574 4930918 5012187 5090328 5142483 5220972 5232702 5312568 5503359 5587356 5732604 5833176 5846429 5848314 5937576 6029118 6134892 6150813 6244692 6258722 6354248 6419353 6452214 6519432 6682916 6796962 6854434 6856644 6976936 7148529 7174571 7211298 7257636 7337812 7396377 7526138 7660838 7769448 7797752 7849053 7915421 7968852 8038824 8201084 8381034 8411566 8602952 8749764 8772471 8846647 8906364 9062616 9202338 9235862 9342792 9367038 9388083 9531372 9615064 9678321 9713579 9779148 9861836 10024374 10281651 10284966 10441944 10465404 10816947 11006718 11174712 11289207 11465208 11491257 11692858 11696628 12058236 12269784 12297661 12301626 12489384 12517444 12617349 12838706 12904428 13365832 13502777 13593924 13708868 13713288 13853793 14297058 14349142 14422596 14515272 14675624 14792754 14825989 15036561 15052276 15091339 15321676 15698106 15830842 15937704 16402168 16510077 16570223 16762068 16823132 17499528 17539287 17544942 17693294 17812728 18404676 18452439 18471724 18734076 18776166 19062744 19258059 19356642 19427158 19558296 19723672 20048748 20432011 20563302 20569932 20930808 21523713 21633894 22013436 22189131 22578414 22982514 23034149 23385716 23393256 23746263 24116472 24595322 24603252 25034888 25234698 25677412 25808856 26539941 27005554 27187848 27417736 27707586 28164249 28402393 28594116 28698284 28845192 29140737 29585508 29651978 30073122 30104552 30182678 30643352 30844953 31185701 31396212 31661684 31743851 33020154 33140446 33524136 33646264 33867621 34473771 34854607 35078574 35089884 35386588 36809352 36892983 36904878 36943448 37468152 37552332 37852047 38516118 38713284 38854316 40097496 40508331 40864022 41126604 41139864 41561379 43047426 43267788 44026872 44378262 44477967 45156828 45274017 45965028 46068298 46771432 47492526 48451141 49190644 49206504 49710669 50469396 51354824 52617861 53079882 53199137 54011108 55415172 56328498 56804786 57188232 57396568 57774177 58262689 58281474 59171016 59303956 59457859 60146244 60365356 61296033 61689906 62371402 62792424 63323368 63487702 64571139 65117123 66040308 66280892 67735242 68947542 69102447 69709214 70157148 70179768 70773176 71238789 71498311 73785966 73809756 75104664 75704094 77032236 77426568 77708632 79619823 81016662 81728044 82253208 83122758 85207179 86094852 86535576 87422211 88756524 88955934 90313656 90548034 91930056 92136596 93557103 94985052 95231553 96902282 98381288 99389293 99421338 100938792 104563821 105235722 106159764 106398274 108022216 109129001 110678949 110830344 111082151 112656996 113609572 115548354 116525378 116562948 118607912 118915718 120292488 120730712 121524993 121967707 122592066 123379812 124742804 126975404 129142278 130234246 132080616 132561784 133433901 135470484 135822051 137895084 138204894 139418428 140314296 142477578 142996622 145353423 147571932 147619512 149132007 150392999 151408188 154064472 159239646 159597411 162033324 163456088 166245516 169546441 170414358 172189704 174788067 174844422 177513048 177911868 178373577 181096068 183888099 184273192 187114206 189970104 190463106 193804564 195351369 198778586 198842676 207307341 209060237 209127642 210471444 212319528 212796548 214494933 218258002 221357898 222164302 225313992 227219144 229547209 231096708 233050756 233125896 233655559 237831436 243049986 243935414 245184132 246759624 249485608 253950808 255621537 256552763 258284556 260468492 266867802 270940968 271644102 275790168 276409788 278836856 280671309 281693791 284955156 285694659 285993244 290706846 295143864 298167879 298264014 300785998 302816376 313691463 318479292 319194822 324066648 327387003 332491032 333246453 339092882 340828716 349576134 349688844 355823736 356632169 356747154 362192136 365903121 367776198 374228412 380926212 387609128 390702738 391580533 397557172 397685352 414614682 418120474 418255284 420942888 425593096 428989866 436060269 436516004 437648831 442715796 444328604 451178997 459094418 462193416 466101512 467311118 475662872 478792233 482840681 486099972 487870828 490368264 508639323 511243074 513105526 516569112 520936984 524364201 533735604 535120731 539645467 543288204 552819576 561342618 563387582 569910312 571389318 571986488 581413692 586054107 592528319 596335758 596528028 601571996 627180711 627382926 636958584 638389644 643484799 654774006 666492906 678185764 681657432 688641627 699152268 699377688 700966677 713264338 713494308 731806242 735552396 748456824 750157321 761852424 769658289 781405476 783161066 795114344 823669397 829229364 836240948 836510568 845081373 857979732 872120538 873032008 875297662 885431592 888657208 894503637 902357994 904385329 918188836 920571679 934622236 957584466 965681362 972199944 975741656 982161009 999739359 1010783603 1017278646 1022486148 1026211052 1048728402 1067471208 1069896507 1070241462 1079290934 1086576408 1097709363 1106991091 1122685236 1126775164 1142778636 1162827384 1172108214 1174741599 1185056638 1192671516 1193056056 1203143992 1254361422 1254765852 1276779288 1286969598 1309548012 1312946493 1332985812 1353536991 1356371528 1377283254 1398304536 1401933354 1405083089 1426528676 1426988616 1448522043 1463612484 1471104792 1500314642 1525917969 1539316578 1562810952 1566322132 1618936401 1647338794 1658458728 1672481896 1689617981 1690162746 1715959464 1744241076 1750595324 1777584957 1789007274 1804715988 1808770658 1836377672 1841143358 1869244472 1881542133 1888396567 1915168932 1931362724 1964322018 1999478718 2021567206 2034557292 2044972296 2052422104 2065924881 2073451019 2097456804 2102900031 2139793014 2140482924 2158581868 2195418726 2213982182 2245370472 2250471963 2253550328 2285557272 2308974867 2344216428 2349483198 2370113276 2385343032 2471008191 2508722844 2509531704 2535244119 2573939196 2619096024 2625892986 2665971624 2707073982 2713155987 2754566508 2761715037 2803866708 2810166178 2853057352 2882289497 2897044086 2927224968 3000629284 3032350809 3051835938 3078633156 3132644264 3209689521 3221382379 3237872802 3294677588 3320973273 3379235962 3380325492 3488482152 3501190648 3524224797 3554024029 3555169914 3578014548 3609431976 3617541316 3682286716 3763084266 3776793134 3830337864 3862725448 3928644036 3938839479 3972144503 3998957436 4043134412 4069114584 4131849762 4146902038 4194913608 4205800062 4215249267 4279586028 4280965848 4317163736 4345566129 4361396971 4390837452 4427964364 4500943926 4617949734 4688432856 4698966396 4740226552 4856809203 4942016382 5017445688 5068853943 5070488238 5147878392 5251785972 5332754871 5414147964 5426311974 5509133016 5523430074 5607733416 5620332356 5665189701 5764578994 5794088172 6001258568 6062746873 6064701618 6103671876 6157266312 6220353057 6419379042 6442764758 6475745604 6589355176 6641946546 6656869061 6751415889 6758471924 6760650984 6776011211 7048449594 7108048058 7110339828 7156029096 7235082632 7364573432 7413024573 7440030127 7526168532 7553586268 7857288072 7877678958 7944289006 7997914872 8086268824 8139467961 8263699524 8285145111 8293804076 8411600124 8430498534 8559172056 8646868491 8691132258 8722793942 8781674904 8855928728 9001887852 9097052427 9173972939 9235899468 9397932792 9664147137 9713618406 9884032764 9962919819 10137707886 10140976476 10342332901 10503571944 10662072087 10665509742 10828295928 10852623948 11046860148 11240664712 11330379402 11529157988 11588176344 11916433509 12125493746 12129403236 12207343752 12440706114 12645747801 12752674457 12838758084 12885529516 12951491208 13084190913 13283893092 13313738122 13502831778 13516943848 13552022422 14002379749 14096899188 14216096116 14220679656 14252989099 14826049146 14880060254 15052337064 15107172536 15206561829 15649718543 15755357916 15888578012 16278935922 16527399048 16570290222 16587608152 16823200248 16860997068 16995569103 17183321251 17293736982 17382264516 17445587884 18003775704 18188240619 18194104854 18347945878 18471798936 18661059171 19328294274 19427236812 19768065528 19925839638 19970607183 20275415772 20281952952 20328033633 20684665802 21324144174 21331019484 21705247896 21754562309 22093720296 22320090381 22660758804 23058315976 23832867018 23886412513 24250987492 24258806472 24881412228 25291495602 25505348914 25677516168 25771059032 25940605473 26168381826 26567786184 26627476244 26696578691 27005663556 27104044844 27521918817 28004759498 28193798376 28432192232 28505978198 28992441411 29652098292 29760120508 30413123658 31026998703 31299437086 31510715832 31777156024 31986216261 32102741639 32557871844 33140580444 33721994136 33991138206 34366642502 34587473964 34764529032 34891175768 35749300527 36376481238 36388209708 36695891756 37322118342 38258023371 38656588548 38854473624 39252572739 39851679276 39941214366 40550831544 40656067266 41369331604 42007139247 42648288348 42662038968 42758967297 43509124618 44640180762 45321517608 46949155629 47665734036 47772825026 48501974984 48998921449 49762824456 50582991204 51010697828 51549963753 51881210946 52336763652 53254952488 53393157382 54011327112 54208089688 54564721857 54763500443 55043837634 56009518996 57011956396 57984882822 59304196584 59520241016 59911821549 60826247316 60984100899 62053997406 62598874172 63972432522 64205483278 65115743688 65263686927 66281160888 66960271143 67526456551 67982276412 68733285004 69174947928 71498601054 71659237539 72752962476 72776419416 73391783512 74644236684 76516046742 77313177096 78505145478 79703358552 79882428732 80089736073 81312134532 82565756451 82738663208 84014278494 85296576696 85517934594 87018249236 89280361524 93080996109 93898311258 95331468072 95545650052 96308224917 97997842898 101165982408 102021395656 103066696841 103099927506 103762421892 104673527304 106786314764 109129443714 109527000886 110087675268 112019037992 114023912792 114774070113 115192190587 115969765644 119823643098 121652494632 121968201798 124107994812 125197748344 126021417741 126480512159 127944865044 128276901891 128410966556 130527373854 133920542286 135052913102 135964552824 137466570008 140847466887 142997202108 143318475078 145505924952 146996764347 149288473368 153032093484 154649891259 157010290956 159764857464 160179472146 162624269064 164290501329 165131512902 168028556988 171035869188 174036498472 175819659317 178560723048 186161992218 187796622516 191091300104 192616449834 195791060781 195995685796 196504325119 202579369653 206133393682 206199855012 207524843784 213572629528 214977712617 216795465769 218258887428 219054001772 220175350536 229548140226 230384381174 231939531288 239647286196 240269208219 242300814683 243936403596 248215989624 252042835482 252961024318 255889730088 256553803782 256821933112 261054747708 266045215231 267841084572 270105826204 281694933774 285994404216 286636950156 288924674751 293993528694 306064186968 309200090523 309299782518 314020581912 320358944292 328581002658 330263025804 336057113976 342071738376 345576571761 351639318634 369827559253 372323984436 375593245032 379441536477 385232899668 391582121562 391991371592 393008650238 405158739306 406069012721 412266787364 412399710024 413336683871 429955425234 433590931538 436517774856 438108003544 440990293041 453841837747 459096280452 460768762348 479294572392 480538416438 484601629366 487872807192 492871503987 504085670964 505922048636 513107607564 522109495416 527458977951 532090430462 535682169144 540211652408 563389867548 573273900312 577849349502 587987057388 589512975357 607738108959 618400181046 618599565036 630882306961 640717888584 650386397307 657162005316 660526051608 691153143522 703278637268 726902444049 739655118506 744647968872 758883072954 770465799336 783164243124 786017300476 798135645693 810317478612 812138025442 824533574728 826673367742 859910850468 867181863076 881980586082 907683675494 918192560904 921537524696 927600271569 930979507531 961076832876 969203258732 985743007974 1008171341928 1011844097272 1026215215128 1036729715283 1054917955902 1064180860924 1109482677759 1126779735096 1138324609431 1155698699004 1175974114776 1179025950714 1215476217918 1218207038163 1236800362092 1237199130072 1240010051613 1261764613922 1300772794614 1314324010632 1361525513241 1382306287044 1406557274536 1453804888098 1479310237012 1517766145908 1566328486248 1572034600952 1582376933853 1596271291386 1620634957224 1624276050884 1653346735484 1719821700936 1734363726152 1763961172164 1768538926071 1815367350988 1855200543138 1861959015062 1892646920883 1922153665752 1938406517464 1951159191921 1958267239979 1971486015948 2073459430566 2109835911804 2128361721848 2180707332147 2218965355518 2276649218862 2311397398008 2358051901428 2394406937079 2430952435836 2436414076326 2473600724184 2480020103226 2523529227844 2601545589228 2723051026482 2764612574088 2792938522593 2907609776196 2958620474024 2988934208389 3035532291816 3164753867706 3192542582772 3248552101768 3306693470968 3328448033277 3340573527023 3527922344328 3537077852142 3630734701976 3654621114489 3710401086276 3720030154839 3723918030124 3785293841766 3902318383842 3916534479958 3942972031896 4084576539723 4119113849611 4146918861132 4219671823608 4361414664294 4437930711036 4553298437724 4716103802856 4788813874158 4861904871672 4872828152652 4960040206452 5047058455688 5203091178456 5446102052964 5585877045186 5677940762649 5815219552392 5874801719937 5977868416778 6287068507301 6329507735412 6385085165544 6656896066554 6681147054046 7026723625807 7074155704284 7309242228978 7420802172552 7440060309678 7447836060248 7570587683532 7715311241699 7804636767684 7833068959916 8169153079446 8238227699222 8293837722264 8378815567779 8722829328588 8875861422072 8966802625167 9106596875448 9577627748316 9745656305304 9920080412904 10021720581069 10724999218337 10892204105928 11171754090372 11355881525298 11749603439874 11955736833556 11986763832259 12357341548833 12574137014602 12659015470824 13313792133108 13362294108092 14053447251614 14148311408568 14618484457956 14880120619356 15141175367064 15430622483398 15609273535368 15666137919832 16338306158892 16476455398444 16757631135558 17445658657176 17624405159811 17933605250334 18861205521903 19155255496632 20043441162138 21080170877421 21449998436674 22343508180744 22711763050596 23145933725097 23499206879748 23911473667112 23973527664518 24714683097666 25148274029204 26627584266216 26724588216184 26900407875501 28106894503228 29236968915912 29760241238712 30065161743207 30861244966796 32174997655011 32676612317784 32952910796888 33515262271116 35248810319622 35867210500668 35960291496777 37072024646499 37722411043806 40086882324276 42160341754842 42899996873348 45423526101192 46291867450194 46998413759496 47947055329036 49429366195332 50296548058408 53800815751002 56213789006456 56583616565709 56789749959391 60130323486414 61722489933592 63240512632263 64349995310022 67030524542232 69437801175291 70497620639244 71734421001336 71920582993554 74144049292998 75444822087612 80173764648552 84320683509684 85799993746696 92583734900388 95894110658072 96524992965033 98858732390664 107601631502004 107880874490331 113167233131418 113579499918782 119454301638719 120260646972828 126481025264526 128699990620044 138875602350582 140995241278488 143841165987108 148288098585996 150889644175224 168641367019368 170369249878173 182324986711729 185167469800776 193049985930066 203774985148403 215203263004008 215761748980662 226334466262836 227158999837564 238908603277438 240521293945656 252962050529052 257399981240088 277751204701164 287682331974216 296576197171992 340738499756346 358362904916157 364649973423458 386099971860132 407549970296806 431523497961324 452668932525672 454317999675128 477817206554876 505924101058104 511107749634519 546974960135187 555502409402328 611324955445209 681476999512692 716725809832314 729299946846916 772199943720264 815099940593612 863046995922648 955634413109752 1022215499269038 1075088714748471 1093949920270374 1222649910890418 1362953999025384 1433451619664628 1458599893693832 1630199881187224 1640924880405561 1833974866335627 2044430998538076 2150177429496942 2187899840540748 2445299821780836 2866903239329256 3281849760811122 3464174747522851 3667949732671254 4088861997076152 4300354858993884 4375799681081496 4890599643561672 6563699521622244 6928349495045702 7335899465342508 8600709717987768 10392524242568553 13127399043244488 13856698990091404 14671798930685016 20785048485137106 27713397980182808 31177572727705659 41570096970274212 62355145455411318 83140193940548424 124710290910822636 249420581821645272
- Sum of all divisors σ(n): 797110413868863900
- Sum of proper divisors (its aliquot sum) s(n): 547689832047218628
- 249420581821645272 is an abundant number, because the sum of its proper divisors (547689832047218628) is greater than itself. Its abundance is 298269250225573356
Bases of 249420581821645272
- Binary: 11011101100001111010110010100110110010011010000001110110002
- Hexadecimal: 0x3761EB29B2681D8
- Base-36: 1W7W7TGO0UE0
Squares and roots of 249420581821645272
- 249420581821645272 squared (2494205818216452722) is 62210626636248043911387016999953984
- 249420581821645272 cubed (2494205818216452723) is 15516610691102130016322131395024929142740519171163648
-
The
square root of 249420581821645272 is 499420245.7066045615 -
The
cube root of 249420581821645272 is 629473.4677005823
Scales and comparisons
How big is 249420581821645272?- 249,420,581,821,645,272 seconds is equal to 7,930,802,993 years, 21 weeks, 3 days, 9 hours, 1 minute, 12 seconds.
-
To count from 1 to 249,420,581,821,645,272 would take you about twenty-three billion, seven hundred ninety-two million, four hundred eight thousand, nine hundred eighty 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 249420581821645272 cubic inches would be around 52456.1 feet tall.
Recreational maths with 249420581821645272
- 249420581821645272 backwards is 272546128185024942
- 249420581821645272 is a
Harshad number . - The number of decimal digits it has is: 18
- The sum of 249420581821645272'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 249420581821645272 - Facts about the integer". Numbermatics.com. 2024. Web. 25 June 2024.
APA style:
Numbermatics. (2024). Number 249420581821645272 - Facts about the integer. Retrieved 25 June 2024, from https://numbermatics.com/n/249420581821645272/
Chicago style:
Numbermatics. 2024. "Number 249420581821645272 - Facts about the integer". https://numbermatics.com/n/249420581821645272/
The information we have on file for 249420581821645272 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 249420581821645272, math, Factors of 249420581821645272, curriculum, school, college, exams, university, Prime factorization of 249420581821645272, STEM, science, technology, engineering, physics, economics, calculator, two hundred forty-nine quadrillion, four hundred twenty trillion, five hundred eighty-one billion, eight hundred twenty-one million, six hundred forty-five thousand, two hundred seventy-two.