81839938040

Names of 81839938040

• Cardinal: 81839938040 can be written as Eighty-one billion, eight hundred thirty-nine million, nine hundred thirty-eight thousand and forty.

Scientific notation

• Scientific notation: 8.183993804 × 10¹⁰

Factors of 81839938040

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 33441

Divisors of 81839938040

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 4 5 7 8 10 14 19 20 28 35 38 40 56 70 76 95 133 140 152 190 266 280 380 467 532 665 760 934 1064 1330 1868 2335 2660 3269 3736 4670 5320 6538 8873 9340 13076 16345 17746 18680 26152 32690 32941 35492 44365 62111 65380 65882 70984 88730 124222 130760 131764 164705 177460 230587 248444 263528 310555 329410 354920 461174 496888 621110 625879 658820 922348 1152935 1242220 1251758 1317640 1844696 2305870 2484440 2503516 3129395 4381153 4611740 5007032 6258790 8762306 9223480 12517580 15383447 17524612 21905765 25035160 30766894 35049224 43811530 61533788 76917235 87623060 107684129 123067576 153834470 175246120 215368258 292285493 307668940 430736516 538420645 584570986 615337880 861473032 1076841290 1169141972 1461427465 2045998451 2153682580 2338283944 2922854930 4091996902 4307365160 5845709860 8183993804 10229992255 11691419720 16367987608 20459984510 40919969020 81839938040
• Sum of all divisors σ(n): 222002726400
• Sum of proper divisors (its aliquot sum) s(n): 140162788360
• 81839938040 is an abundant number, because the sum of its proper divisors (140162788360) is greater than itself. Its abundance is 58322850320

Bases of 81839938040

• Binary: 1001100001110000010100101100111111000₂
• Hexadecimal: 0x130E0A59F8
• Base-36: 11LHDWC8

Squares and roots of 81839938040

• 81839938040 squared (81839938040²) is 6697775458391039041600
• 81839938040 cubed (81839938040³) is 548145528520555233255764982464000
• The square root of 81839938040 is 286076.8044424433
• The cube root of 81839938040 is 4341.6528712485

Scales and comparisons

• 81,839,938,040 seconds is equal to 2,602 years, 13 weeks, 2 days, 12 hours, 7 minutes, 20 seconds.
• To count from 1 to 81,839,938,040 would take you about five thousand, two hundred four 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 81839938040 cubic inches would be around 361.8 feet tall.

Recreational maths with 81839938040

• 81839938040 backwards is 04083993818
• The number of decimal digits it has is: 11
• The sum of 81839938040's digits is 53
• More coming soon!