81331898987315200

Names of 81331898987315200

• Cardinal: 81331898987315200 can be written as Eighty-one quadrillion, three hundred thirty-one trillion, eight hundred ninety-eight billion, nine hundred eighty-seven million, three hundred fifteen thousand, two hundred.

Scientific notation

• Scientific notation: 8.13318989873152 × 10¹⁶

Factors of 81331898987315200

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 26
• Sum of prime factors: 160

Divisors of 81331898987315200

• Number of divisors d(n): 1368
• Complete list of divisors:
  1 2 4 5 7 8 10 14 16 20 25 28 32 35 37 40 50 56 64 70 74 80 100 109 112 128 140 148 160 175 185 200 218 224 256 259 280 296 320 350 370 400 436 448 512 518 545 560 592 640 700 740 763 800 872 896 925 1024 1036 1090 1120 1184 1280 1295 1369 1400 1480 1526 1600 1744 1792 1850 2048 2072 2180 2240 2368 2560 2590 2725 2738 2800 2960 3052 3200 3488 3584 3700 3815 4033 4096 4144 4360 4480 4736 5120 5180 5450 5476 5600 5920 6104 6400 6475 6845 6976 7168 7400 7630 8066 8192 8288 8720 8960 9472 9583 10240 10360 10900 10952 11200 11840 11881 12208 12800 12950 13690 13952 14336 14800 15260 16132 16384 16576 17440 17920 18944 19075 19166 20165 20480 20720 21800 21904 22400 23680 23762 24416 25600 25900 27380 27904 28231 28672 29600 30520 32264 32768 33152 34225 34880 35840 37888 38150 38332 40330 40960 41440 43600 43808 44800 47360 47524 47915 48832 51200 51800 54760 55808 56462 57344 59200 59405 61040 64528 65536 66304 68450 69760 71680 75776 76300 76664 80660 81920 82880 83167 87200 87616 89600 94720 95048 95830 97664 100825 102400 103600 109520 111616 112924 114688 118400 118810 122080 129056 131072 132608 136900 139520 141155 143360 149221 151552 152600 153328 161320 163840 165760 166334 174400 175232 179200 189440 190096 191660 195328 201650 204800 207200 219040 223232 225848 229376 236800 237620 239575 244160 258112 262144 265216 273800 279040 282310 286720 297025 298442 303104 305200 306656 322640 327680 331520 332668 348800 350464 358400 378880 380192 383320 390656 403300 409600 414400 415835 438080 439597 446464 451696 458752 473600 475240 479150 488320 516224 530432 547600 558080 564620 573440 594050 596884 606208 610400 613312 645280 655360 663040 665336 697600 700928 705775 716800 746105 757760 760384 766640 781312 806600 819200 828800 831670 876160 879194 892928 903392 917504 947200 950480 958300 976640 1032448 1044547 1060864 1095200 1116160 1129240 1146880 1188100 1193768 1212416 1220800 1226624 1290560 1295029 1310720 1326080 1330672 1395200 1401856 1411550 1433600 1492210 1515520 1520768 1533280 1562624 1613200 1638400 1657600 1663340 1752320 1758388 1785856 1806784 1835008 1894400 1900960 1916600 1953280 2064896 2079175 2089094 2121728 2190400 2197985 2232320 2258480 2293760 2376200 2387536 2424832 2441600 2453248 2581120 2590058 2652160 2661344 2790400 2803712 2823100 2867200 2984420 3031040 3041536 3066560 3077179 3125248 3226400 3276800 3315200 3326680 3504640 3516776 3571712 3613568 3730525 3788800 3801920 3833200 3906560 4129792 4158350 4178188 4243456 4380800 4395970 4464640 4516960 4587520 4752400 4775072 4849664 4883200 4906496 5162240 5180116 5222735 5304320 5322688 5580800 5607424 5646200 5734400 5968840 6062080 6083072 6133120 6154358 6250496 6452800 6475145 6553600 6630400 6653360 7009280 7033552 7143424 7227136 7461050 7577600 7603840 7666400 7813120 8259584 8316700 8356376 8486912 8761600 8791940 8929280 9033920 9065203 9175040 9504800 9550144 9699328 9766400 9812992 10324480 10360232 10445470 10608640 10645376 10989925 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68130406400 68455432192 70915788040 72023572480 72867598720 74262142976 76665716800 77863321600 78775782400 83277255680 84871020544 85569290240 85865602816 88644735050 90029465600 91084498400 92507340800 92827678720 97793474560 98132117504 99282103256 100833001472 104096569600 106088775680 106961612800 107332003520 109008650240 113465260864 115237715968 116034598400 116588157952 122241843200 122665146880 124102629070 126041251840 132610969600 133243609088 134165004400 136260812800 136910864384 141831576080 144047144960 145735197440 148524285952 153331433600 157551564800 166554511360 169742041088 171138580480 171731205632 177289470100 180058931200 182168996800 185014681600 185655357440 195586949120 196264235008 198564206512 201666002944 208193139200 212177551360 213923225600 214664007040 226930521728 232069196800 233176315904 244483686400 245330293760 248205258140 252082503680 265221939200 266487218176 268330008800 272521625600 273821728768 283663152160 288094289920 291470394880 297048571904 306662867200 310256572675 315103129600 333109022720 339484082176 342277160960 343462411264 354578940200 360117862400 364337993600 371310714880 392528470016 397128413024 403332005888 416386278400 424355102720 427846451200 429328014080 453861043456 464138393600 466352631808 488967372800 490660587520 496410516280 504165007360 530443878400 532974436352 536660017600 545043251200 567326304320 576188579840 582940789760 594097143808 613325734400 620513145350 630206259200 666218045440 684554321920 686924822528 709157880400 720235724800 728675987200 742621429760 785056940032 794256826048 806664011776 832772556800 848710205440 855692902400 858656028160 907722086912 928276787200 932705263616 977934745600 981321175040 992821032560 1008330014720 1060887756800 1065948872704 1073320035200 1134652608640 1165881579520 1188194287616 1226651468800 1241026290700 1260412518400 1332436090880 1369108643840 1373849645056 1418315760800 1440471449600 1457351974400 1485242859520 1570113880064 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11881942876160 12560911040512 12708109216768 13324360908800 13738496450560 14523553390592 14852428595200 14923284217856 15701138800640 15885136520960 17173120563200 18154441738240 18654105272320 19626423500800 19856420651200 20166600294400 21318977454080 21981594320896 22693052172800 23317631590400 25416218433536 26648721817600 27476992901120 29047106781184 29704857190400 29846568435712 31402277601280 31770273041920 34346241126400 36308883476480 37308210544640 39252847001600 39712841302400 43963188641792 45386104345600 46635263180800 50832436867072 53297443635200 54953985802240 58094213562368 59409714380800 62804555202560 63540546083840 68692482252800 72617766952960 74616421089280 78505694003200 79425682604800 87926377283584 90772208691200 93270526361600 101664873734144 106594887270400 109907971604480 116188427124736 127081092167680 137384964505600 145235533905920 149232842178560 157011388006400 158851365209600 181544417382400 186541052723200 203329747468288 219815943208960 232376854249472 254162184335360 274769929011200 290471067811840 314022776012800 317702730419200 363088834764800 373082105446400 406659494936576 439631886417920 464753708498944 508324368670720 549539858022400 580942135623680 635405460838400 726177669529600 746164210892800 813318989873152 1016648737341440 1099079716044800 1161884271247360 1270810921676800 1452355339059200 1626637979746304 2033297474682880 2198159432089600 2323768542494720 2541621843353600 2904710678118400 3253275959492608 4066594949365760 5083243686707200 5809421356236800 8133189898731520 10166487373414400 11618842712473600 16266379797463040 20332974746828800 40665949493657600 81331898987315200
• Sum of all divisors σ(n): 239109648334196640
• Sum of proper divisors (its aliquot sum) s(n): 157777749346881440
• 81331898987315200 is an abundant number, because the sum of its proper divisors (157777749346881440) is greater than itself. Its abundance is 76445850359566240

Bases of 81331898987315200

• Binary: 100100000111100101110111001100100000011000000000000000000₂
• Hexadecimal: 0x120F2EE640C0000
• Base-36: M8TR2L5N7R4

Squares and roots of 81331898987315200

• 81331898987315200 squared (81331898987315200²) is 6614877792882843255290504151040000
• 81331898987315200 cubed (81331898987315200³) is 538000572464181924644958209146757037904887808000000
• The square root of 81331898987315200 is 285187480.4182595951
• The cube root of 81331898987315200 is 433265.0301718157

Scales and comparisons

• 81,331,898,987,315,200 seconds is equal to 2,586,102,811 years, 37 weeks, 1 day, 7 hours, 6 minutes, 40 seconds.
• To count from 1 to 81,331,898,987,315,200 would take you about seven billion, seven hundred fifty-eight million, three hundred eight thousand, four 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 81331898987315200 cubic inches would be around 36105.4 feet tall.

Recreational maths with 81331898987315200

• 81331898987315200 backwards is 00251378989813318
• The number of decimal digits it has is: 17
• The sum of 81331898987315200's digits is 76
• More coming soon!