81808407040

Names of 81808407040

• Cardinal: 81808407040 can be written as Eighty-one billion, eight hundred eight million, four hundred seven thousand and forty.

Scientific notation

• Scientific notation: 8.180840704 × 10¹⁰

Factors of 81808407040

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 5660

Divisors of 81808407040

• Number of divisors d(n): 60
• Complete list of divisors:
  1 2 4 5 8 10 16 20 32 40 64 80 128 160 256 320 512 640 1280 2560 5653 11306 22612 28265 45224 56530 90448 113060 180896 226120 361792 452240 723584 904480 1447168 1808960 2894336 3617920 7235840 14471680 31956409 63912818 127825636 159782045 255651272 319564090 511302544 639128180 1022605088 1278256360 2045210176 2556512720 4090420352 5113025440 8180840704 10226050880 16361681408 20452101760 40904203520 81808407040
• Sum of all divisors σ(n): 196183142694
• Sum of proper divisors (its aliquot sum) s(n): 114374735654
• 81808407040 is an abundant number, because the sum of its proper divisors (114374735654) is greater than itself. Its abundance is 32566328614

Bases of 81808407040

• Binary: 1001100001100001010010011101000000000₂
• Hexadecimal: 0x130C293A00
• Base-36: 11KYM2V4

Squares and roots of 81808407040

• 81808407040 squared (81808407040²) is 6692615462422321561600
• 81808407040 cubed (81808407040³) is 547512209912043106693141233664000
• The square root of 81808407040 is 286021.6898069095
• The cube root of 81808407040 is 4341.0952207713

Scales and comparisons

• 81,808,407,040 seconds is equal to 2,601 years, 13 weeks, 1 day, 13 hours, 30 minutes, 40 seconds.
• To count from 1 to 81,808,407,040 would take you about five thousand, two hundred two 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 81808407040 cubic inches would be around 361.8 feet tall.

Recreational maths with 81808407040

• 81808407040 backwards is 04070480818
• 81808407040 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 81808407040's digits is 40
• More coming soon!