81979617296720

Names of 81979617296720

• Cardinal: 81979617296720 can be written as Eighty-one trillion, nine hundred seventy-nine billion, six hundred seventeen million, two hundred ninety-six thousand, seven hundred twenty.

Scientific notation

• Scientific notation: 8.197961729672 × 10¹³

Factors of 81979617296720

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 7110

Divisors of 81979617296720

• Number of divisors d(n): 270
• Complete list of divisors:
  1 2 4 5 8 10 11 13 16 20 22 26 40 44 52 55 65 80 88 104 110 121 130 143 169 176 208 220 242 260 286 338 440 484 520 572 605 676 715 845 880 968 1040 1144 1210 1352 1430 1573 1690 1859 1936 2288 2420 2704 2860 3146 3380 3718 4840 5720 6292 6760 7079 7436 7865 9295 9680 11440 12584 13520 14158 14872 15730 18590 20449 25168 28316 29744 31460 35395 37180 40898 56632 62920 70790 74360 77869 81796 92027 102245 113264 125840 141580 148720 155738 163592 184054 204490 283160 311476 327184 368108 389345 408980 460135 566320 622952 736216 778690 817960 856559 920270 1012297 1196351 1245904 1472432 1557380 1635920 1713118 1840540 2024594 2392702 3114760 3426236 3681080 4049188 4282795 4785404 5061485 5981755 6229520 6852472 7362160 8098376 8565590 9570808 10122970 11135267 11963510 13159861 13704944 16196752 17131180 19141616 20245940 22270534 23927020 26319722 34262360 40491880 44541068 47854040 50112241 52639444 55676335 65799305 68524720 80983760 89082136 95708080 100224482 105278888 111352670 131598610 144758471 178164272 200448964 210557776 222705340 250561205 263197220 289516942 400897928 445410680 501122410 526394440 551234651 579033884 651459133 723792355 801795856 890821360 1002244820 1052788880 1102469302 1158067768 1302918266 1447584710 2004489640 2204938604 2316135536 2605836532 2756173255 2895169420 3257295665 4008979280 4409877208 5211673064 5512346510 5790338840 6063581161 6514591330 7166050463 8468968729 8819754416 10423346128 11024693020 11580677680 12127162322 13029182660 14332100926 16937937458 22049386040 24254324644 26058365320 28664201852 30317905805 33875874916 35830252315 42344843645 44098772080 48508649288 52116730640 57328403704 60635811610 67751749832 71660504630 78826555093 84689687290 93158656019 97017298576 114656807408 121271623220 135503499664 143321009260 157653110186 169379374580 186317312038 242543246440 286642018520 315306220372 338758749160 372634624076 394132775465 465793280095 485086492880 573284037040 630612440744 677517498320 745269248152 788265550930 931586560190 1024745216209 1261224881488 1490538496304 1576531101860 1863173120380 2049490432418 3153062203720 3726346240760 4098980864836 5123726081045 6306124407440 7452692481520 8197961729672 10247452162090 16395923459344 20494904324180 40989808648360 81979617296720
• Sum of all divisors σ(n): 226892872610334
• Sum of proper divisors (its aliquot sum) s(n): 144913255313614
• 81979617296720 is an abundant number, because the sum of its proper divisors (144913255313614) is greater than itself. Its abundance is 62933638016894

Bases of 81979617296720

• Binary: 10010101000111101011101111101111100000101010000₂
• Hexadecimal: 0x4A8F5DF7C150
• Base-36: T24WZHJRK

Squares and roots of 81979617296720

• 81979617296720 squared (81979617296720²) is 6720657652116673000522758400
• 81979617296720 cubed (81979617296720³) is 550956942302797630433155746130645672448000
• The square root of 81979617296720 is 9054259.6216764185
• The cube root of 81979617296720 is 43441.2148733293

Scales and comparisons

• 81,979,617,296,720 seconds is equal to 2,606,698 years, 13 weeks, 3 hours, 45 minutes, 20 seconds.
• To count from 1 to 81,979,617,296,720 would take you about six million, five hundred sixteen thousand, seven hundred forty-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 81979617296720 cubic inches would be around 3620.1 feet tall.

Recreational maths with 81979617296720

• 81979617296720 backwards is 02769271697918
• The number of decimal digits it has is: 14
• The sum of 81979617296720's digits is 74
• More coming soon!