81831817920

Names of 81831817920

• Cardinal: 81831817920 can be written as Eighty-one billion, eight hundred thirty-one million, eight hundred seventeen thousand, nine hundred twenty.

Scientific notation

• Scientific notation: 8.183181792 × 10¹⁰

Factors of 81831817920

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 117988

Divisors of 81831817920

• Number of divisors d(n): 112
• Complete list of divisors:
  1 2 3 4 5 6 8 10 12 15 16 20 24 30 32 40 48 60 64 80 96 120 160 192 240 320 480 727 960 1454 2181 2908 3635 4362 5816 7270 8724 10905 11632 14540 17448 21810 23264 29080 34896 43620 46528 58160 69792 87240 116320 117251 139584 174480 232640 234502 348960 351753 469004 586255 697920 703506 938008 1172510 1407012 1758765 1876016 2345020 2814024 3517530 3752032 4690040 5628048 7035060 7504064 9380080 11256096 14070120 18760160 22512192 28140240 37520320 56280480 85241477 112560960 170482954 255724431 340965908 426207385 511448862 681931816 852414770 1022897724 1278622155 1363863632 1704829540 2045795448 2557244310 2727727264 3409659080 4091590896 5114488620 5455454528 6819318160 8183181792 10228977240 13638636320 16366363584 20457954480 27277272640 40915908960 81831817920
• Sum of all divisors σ(n): 260175621888
• Sum of proper divisors (its aliquot sum) s(n): 178343803968
• 81831817920 is an abundant number, because the sum of its proper divisors (178343803968) is greater than itself. Its abundance is 96511986048

Bases of 81831817920

• Binary: 1001100001101100011100111001011000000₂
• Hexadecimal: 0x130D8E72C0
• Base-36: 11LCJUTC

Squares and roots of 81831817920

• 81831817920 squared (81831817920²) is 6696446424092033126400
• 81831817920 cubed (81831817920³) is 547982384487334356122173145088000
• The square root of 81831817920 is 286062.6118876775
• The cube root of 81831817920 is 4341.5092742501

Scales and comparisons

• 81,831,817,920 seconds is equal to 2,601 years, 51 weeks, 6 days, 12 hours, 32 minutes.
• To count from 1 to 81,831,817,920 would take you about five thousand, two hundred three 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 81831817920 cubic inches would be around 361.8 feet tall.

Recreational maths with 81831817920

• 81831817920 backwards is 02971813818
• 81831817920 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81831817920's digits is 48
• More coming soon!