81616359569489920

Names of 81616359569489920

• Cardinal: 81616359569489920 can be written as Eighty-one quadrillion, six hundred sixteen trillion, three hundred fifty-nine billion, five hundred sixty-nine million, four hundred eighty-nine thousand, nine hundred twenty.

Scientific notation

• Scientific notation: 8.161635956948992 × 10¹⁶

Factors of 81616359569489920

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 35
• Sum of prime factors: 51

Divisors of 81616359569489920

• Number of divisors d(n): 1120
• Complete list of divisors:
  1 2 4 5 7 8 10 14 16 20 28 32 35 37 40 49 56 64 70 74 80 98 112 128 140 148 160 185 196 224 245 256 259 280 296 320 343 370 392 448 490 512 518 560 592 640 686 740 784 896 980 1024 1036 1120 1184 1280 1295 1369 1372 1480 1568 1715 1792 1813 1960 2048 2072 2240 2368 2401 2560 2590 2738 2744 2960 3136 3430 3584 3626 3920 4096 4144 4480 4736 4802 5120 5180 5476 5488 5920 6272 6845 6860 7168 7252 7840 8192 8288 8960 9065 9472 9583 9604 10240 10360 10952 10976 11840 12005 12544 12691 13690 13720 14336 14504 15680 16384 16576 17920 18130 18944 19166 19208 20480 20720 21904 21952 23680 24010 25088 25382 27380 27440 28672 29008 31360 32768 33152 35840 36260 37888 38332 38416 40960 41440 43808 43904 47360 47915 48020 50176 50653 50764 54760 54880 57344 58016 62720 63455 65536 66304 67081 71680 72520 75776 76664 76832 81920 82880 87616 87808 88837 94720 95830 96040 100352 101306 101528 109520 109760 114688 116032 125440 126910 131072 132608 134162 143360 145040 151552 153328 153664 163840 165760 175232 175616 177674 189440 191660 192080 200704 202612 203056 219040 219520 229376 232064 250880 253265 253820 262144 265216 268324 286720 290080 303104 306656 307328 327680 331520 335405 350464 351232 354571 355348 378880 383320 384160 401408 405224 406112 438080 439040 444185 458752 464128 469567 501760 506530 507640 524288 530432 536648 573440 580160 606208 613312 614656 655360 663040 670810 700928 702464 709142 710696 757760 766640 768320 802816 810448 812224 876160 878080 888370 917504 928256 939134 1003520 1013060 1015280 1048576 1060864 1073296 1146880 1160320 1212416 1226624 1229312 1310720 1326080 1341620 1401856 1404928 1418284 1421392 1515520 1533280 1536640 1605632 1620896 1624448 1752320 1756160 1772855 1776740 1835008 1856512 1878268 2007040 2026120 2030560 2097152 2121728 2146592 2293760 2320640 2347835 2424832 2453248 2458624 2481997 2621440 2652160 2683240 2803712 2809856 2836568 2842784 3031040 3066560 3073280 3211264 3241792 3248896 3286969 3504640 3512320 3545710 3553480 3670016 3713024 3756536 4014080 4052240 4061120 4194304 4243456 4293184 4587520 4641280 4695670 4849664 4906496 4917248 4963994 5242880 5304320 5366480 5607424 5619712 5673136 5685568 6062080 6133120 6146560 6422528 6483584 6497792 6573938 7009280 7024640 7091420 7106960 7340032 7426048 7513072 8028160 8104480 8122240 8388608 8486912 8586368 9175040 9282560 9391340 9699328 9812992 9834496 9927988 10485760 10608640 10732960 11214848 11239424 11346272 11371136 12124160 12266240 12293120 12409985 12845056 12967168 12995584 13147876 14018560 14049280 14182840 14213920 14680064 14852096 15026144 16056320 16208960 16244480 16434845 16777216 16973824 17172736 17373979 18350080 18565120 18782680 19398656 19625984 19668992 19855976 20971520 21217280 21465920 22429696 22478848 22692544 22742272 24248320 24532480 24586240 24819970 25690112 25934336 25991168 26295752 28037120 28098560 28365680 28427840 29360128 29704192 30052288 32112640 32417920 32488960 32869690 33554432 33947648 34345472 34747958 36700160 37130240 37565360 38797312 39251968 39337984 39711952 41943040 42434560 42931840 44859392 44957696 45385088 45484544 48496640 49064960 49172480 49639940 51380224 51868672 51982336 52591504 56074240 56197120 56731360 56855680 58720256 59408384 60104576 64225280 64835840 64977920 65739380 67108864 67895296 68690944 69495916 73400320 74260480 75130720 77594624 78503936 78675968 79423904 83886080 84869120 85863680 86869895 89718784 89915392 90770176 90969088 96993280 98129920 98344960 99279880 102760448 103737344 103964672 105183008 112148480 112394240 113462720 113711360 117440512 118816768 120209152 121617853 128450560 129671680 129955840 131478760 134217728 135790592 137381888 138991832 146800640 148520960 150261440 155189248 157007872 157351936 158847808 167772160 169738240 171727360 173739790 179437568 179830784 181540352 181938176 193986560 196259840 196689920 198559760 205520896 207474688 207929344 210366016 224296960 224788480 226925440 227422720 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7604273152 7693385728 7783542592 8220835840 8298987520 8317173760 8414640640 8690597888 8792440832 8895477248 9505341440 9616732160 9729428240 10048503808 10070523904 10166259712 10863247360 10990551040 11119346560 11484004352 11509170176 11618582528 11644043264 12415139840 12560629760 12588154880 12707824640 13278380032 13307478016 13463425024 14355005440 14386462720 14523228160 14555054080 15208546304 15386771456 15567085184 16441671680 16597975040 16634347520 16829281280 17381195776 17584881664 17790954496 19010682880 19233464320 19458856480 20097007616 20141047808 20332519424 21726494720 21981102080 22238693120 22968008704 23018340352 23237165056 23288086528 24830279680 25121259520 25176309760 25415649280 26556760064 26614956032 26926850048 28710010880 28772925440 29046456320 29110108160 30417092608 30773542912 31134170368 32883343360 33195950080 33268695040 33658562560 34762391552 35169763328 35581908992 38021365760 38466928640 38917712960 40194015232 40282095616 40665038848 43452989440 43962204160 44477386240 45936017408 46036680704 46474330112 46576173056 50242519040 50352619520 50831298560 53113520128 53229912064 53853700096 57420021760 57545850880 58092912640 58220216320 60834185216 61547085824 62268340736 66391900160 66537390080 67317125120 70339526656 71163817984 76042731520 76933857280 77835425920 80388030464 80564191232 81330077696 86905978880 87924408320 88954772480 91872034816 92948660224 93152346112 100485038080 100705239040 101662597120 106227040256 106459824128 107707400192 114840043520 115091701760 116185825280 116440432640 121668370432 123094171648 124536681472 132783800320 133074780160 134634250240 140679053312 142327635968 152085463040 153867714560 155670851840 160776060928 161128382464 162660155392 173811957760 175848816640 177909544960 183744069632 185897320448 186304692224 200970076160 201410478080 203325194240 212454080512 212919648256 215414800384 229680087040 230183403520 232371650560 232880865280 243336740864 246188343296 249073362944 265567600640 266149560320 269268500480 281358106624 284655271936 304170926080 307735429120 311341703680 321552121856 322256764928 325320310784 351697633280 355819089920 371794640896 372609384448 401940152320 402820956160 406650388480 424908161024 425839296512 430829600768 459360174080 464743301120 465761730560 492376686592 498146725888 531135201280 532299120640 538537000960 562716213248 569310543872 608341852160 615470858240 622683407360 643104243712 650640621568 703395266560 711638179840 743589281792 745218768896 803880304640 805641912320 813300776960 849816322048 851678593024 861659201536 918720348160 929486602240 931523461120 984753373184 996293451776 1062270402560 1064598241280 1077074001920 1125432426496 1138621087744 1216683704320 1230941716480 1245366814720 1286208487424 1301281243136 1406790533120 1423276359680 1487178563584 1490437537792 1607760609280 1611283824640 1626601553920 1699632644096 1703357186048 1723318403072 1858973204480 1863046922240 1969506746368 1992586903552 2124540805120 2129196482560 2154148003840 2250864852992 2277242175488 2461883432960 2490733629440 2602562486272 2813581066240 2846552719360 2974357127168 2980875075584 3215521218560 3253203107840 3399265288192 3446636806144 3717946408960 3726093844480 3939013492736 3985173807104 4249081610240 4258392965120 4308296007680 4501729705984 4554484350976 4923766865920 4981467258880 5205124972544 5627162132480 5693105438720 5948714254336 5961750151168 6431042437120 6506406215680 6798530576384 6893273612288 7435892817920 7452187688960 7878026985472 7970347614208 8498163220480 8516785930240 8616592015360 9003459411968 9108968701952 9847533731840 9962934517760 10410249945088 11254324264960 11386210877440 11897428508672 11923500302336 13012812431360 13786547224576 14871785635840 14904375377920 15756053970944 15940695228416 16996326440960 17233184030720 18217937403904 19695067463680 19925869035520 20820499890176 22508648529920 22772421754880 23794857017344 26025624862720 27573094449152 29743571271680 29808750755840 31512107941888 31881390456832 33992652881920 34466368061440 36435874807808 39390134927360 39851738071040 41640999780352 45017297059840 45544843509760 47589714034688 52051249725440 55146188898304 59487142543360 59617501511680 63024215883776 63762780913664 68932736122880 72871749615616 78780269854720 79703476142080 83281999560704 91089687019520 104102499450880 110292377796608 118974285086720 127525561827328 137865472245760 145743499231232 157560539709440 159406952284160 166563999121408 182179374039040 208204998901760 220584755593216 237948570173440 255051123654656 275730944491520 291486998462464 315121079418880 318813904568320 333127998242816 364358748078080 416409997803520 441169511186432 510102247309312 551461888983040 582973996924928 637627809136640 728717496156160 832819995607040 1020204494618624 1102923777966080 1165947993849856 1275255618273280 1457434992312320 1665639991214080 2040408989237248 2205847555932160 2331895987699712 2550511236546560 2914869984624640 4080817978474496 5101022473093120 5829739969249280 8161635956948992 10202044946186240 11659479938498560 16323271913897984 20404089892372480 40808179784744960 81616359569489920
• Sum of all divisors σ(n): 234859644925363800
• Sum of proper divisors (its aliquot sum) s(n): 153243285355873880
• 81616359569489920 is an abundant number, because the sum of its proper divisors (153243285355873880) is greater than itself. Its abundance is 71626925786383960

Bases of 81616359569489920

• Binary: 100100001111101011010010110001000000000000000000000000000₂
• Hexadecimal: 0x121F5A588000000
• Base-36: MBML1Z3PTDS

Squares and roots of 81616359569489920

• 81616359569489920 squared (81616359569489920²) is 6661230149376268839521328981606400
• 81616359569489920 cubed (81616359569489920³) is 543665355046620608556765565637386819126310207488000
• The square root of 81616359569489920 is 285685770.6808127327
• The cube root of 81616359569489920 is 433769.5612614885

Scales and comparisons

• 81,616,359,569,489,920 seconds is equal to 2,595,147,778 years, 17 weeks, 2 days, 12 hours, 58 minutes, 40 seconds.
• To count from 1 to 81,616,359,569,489,920 would take you about seven billion, seven hundred eighty-five million, four hundred forty-three thousand, three hundred thirty-five 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 81616359569489920 cubic inches would be around 36147.5 feet tall.

Recreational maths with 81616359569489920

• 81616359569489920 backwards is 02998496595361618
• The number of decimal digits it has is: 17
• The sum of 81616359569489920's digits is 91
• More coming soon!