81491594162880

Names of 81491594162880

• Cardinal: 81491594162880 can be written as Eighty-one trillion, four hundred ninety-one billion, five hundred ninety-four million, one hundred sixty-two thousand, eight hundred eighty.

Scientific notation

• Scientific notation: 8.149159416288 × 10¹³

Factors of 81491594162880

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 3325095

Divisors of 81491594162880

• Number of divisors d(n): 336
• Complete list of divisors:
  1 2 3 4 5 6 8 10 11 12 15 16 20 22 24 30 32 33 40 44 48 55 60 64 66 80 88 96 110 120 121 132 160 165 176 192 211 220 240 242 264 320 330 352 363 422 440 480 484 528 605 633 660 704 726 844 880 960 968 1055 1056 1210 1266 1320 1452 1688 1760 1815 1936 2110 2112 2321 2420 2532 2640 2904 3165 3376 3520 3630 3872 4220 4642 4840 5064 5280 5808 6330 6752 6963 7260 7744 8440 9284 9680 10128 10560 11605 11616 12660 13504 13926 14520 16880 18568 19360 20256 23210 23232 25320 25531 27852 29040 33760 34815 37136 38720 40512 46420 50640 51062 55704 58080 67520 69630 74272 76593 92840 101280 102124 111408 116160 127655 139260 148544 153186 185680 202560 204248 222816 255310 278520 306372 371360 382965 408496 445632 510620 557040 612744 742720 765930 816992 1021240 1114080 1225488 1531860 1633984 2042480 2228160 2450976 3063720 3324863 4084960 4901952 6127440 6649726 8169920 9974589 12254880 13299452 16624315 19949178 24509760 26598904 33248630 36573493 39898356 49872945 53197808 66497260 73146986 79796712 99745890 106395616 109720479 132994520 146293972 159593424 182867465 199491780 212791232 219440958 265989040 292587944 319186848 365734930 398983560 402308423 438881916 531978080 548602395 585175888 638373696 701546093 731469860 797967120 804616846 877763832 1063956160 1097204790 1170351776 1206925269 1403092186 1462939720 1595934240 1609233692 1755527664 2011542115 2104638279 2194409580 2340703552 2413850538 2806184372 2925879440 3191868480 3218467384 3507730465 3511055328 4023084230 4209276558 4388819160 4827701076 5612368744 5851758880 6034626345 6436934768 7015460930 7022110656 7717007023 8046168460 8418553116 8777638320 9655402152 10523191395 11224737488 11703517760 12069252690 12873869536 14030921860 15434014046 16092336920 16837106232 17555276640 19310804304 21046382790 22449474976 23151021069 24138505380 25747739072 28061843720 30868028092 32184673840 33674212464 35110553280 38585035115 38621608608 42092765580 44898949952 46302042138 48277010760 56123687440 61736056184 64369347680 67348424928 77170070230 77243217216 84185531160 84887077253 92604084276 96554021520 112247374880 115755105345 123472112368 128738695360 134696849856 154340140460 168371062320 169774154506 185208168552 193108043040 224494749760 231510210690 246944224736 254661231759 308680280920 336742124640 339548309012 370416337104 386216086080 424435386265 463020421380 493888449472 509322463518 617360561840 673484249280 679096618024 740832674208 848870772530 926040842760 1018644927036 1234721123680 1273306158795 1358193236048 1481665348416 1697741545060 1852081685520 2037289854072 2469442247360 2546612317590 2716386472096 3395483090120 3704163371040 4074579708144 5093224635180 5432772944192 6790966180240 7408326742080 8149159416288 10186449270360 13581932360480 16298318832576 20372898540720 27163864720960 40745797081440 81491594162880
• Sum of all divisors σ(n): 285743493568512
• Sum of proper divisors (its aliquot sum) s(n): 204251899405632
• 81491594162880 is an abundant number, because the sum of its proper divisors (204251899405632) is greater than itself. Its abundance is 122760305242752

Bases of 81491594162880

• Binary: 10010100001110110111101100001011011001011000000₂
• Hexadecimal: 0x4A1DBD85B2C0
• Base-36: SVWPZ43PC

Squares and roots of 81491594162880

• 81491594162880 squared (81491594162880²) is 6640879919207537687969894400
• 81491594162880 cubed (81491594162880³) is 541175891260479984248265057284209999872000
• The square root of 81491594162880 is 9027269.4743693123
• The cube root of 81491594162880 is 43354.8416724047

Scales and comparisons

• 81,491,594,162,880 seconds is equal to 2,591,180 years, 32 weeks, 3 days, 6 hours, 8 minutes.
• To count from 1 to 81,491,594,162,880 would take you about six million, four hundred seventy-seven thousand, nine hundred fifty-one 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 81491594162880 cubic inches would be around 3612.9 feet tall.

Recreational maths with 81491594162880

• 81491594162880 backwards is 08826149519418
• 81491594162880 is a Harshad number.
• The number of decimal digits it has is: 14
• The sum of 81491594162880's digits is 66
• More coming soon!