81406461990

Names of 81406461990

• Cardinal: 81406461990 can be written as Eighty-one billion, four hundred six million, four hundred sixty-one thousand, nine hundred ninety.

Scientific notation

• Scientific notation: 8.140646199 × 10¹⁰

Factors of 81406461990

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 762117

Divisors of 81406461990

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 3 5 6 7 10 14 15 21 30 35 42 70 105 210 509 1018 1527 2545 3054 3563 5090 7126 7635 10689 15270 17815 21378 35630 53445 106890 761591 1523182 2284773 3807955 4569546 5331137 7615910 10662274 11423865 15993411 22847730 26655685 31986822 53311370 79967055 159934110 387649819 775299638 1162949457 1938249095 2325898914 2713548733 3876498190 5427097466 5814747285 8140646199 11629494570 13567743665 16281292398 27135487330 40703230995 81406461990
• Sum of all divisors σ(n): 223725265920
• Sum of proper divisors (its aliquot sum) s(n): 142318803930
• 81406461990 is an abundant number, because the sum of its proper divisors (142318803930) is greater than itself. Its abundance is 60912341940

Bases of 81406461990

• Binary: 1001011110100001101000000100000100110₂
• Hexadecimal: 0x12F4340826
• Base-36: 11EBB02U

Squares and roots of 81406461990

• 81406461990 squared (81406461990²) is 6627012053729314760100
• 81406461990 cubed (81406461990³) is 539481604859187299766826618599000
• The square root of 81406461990 is 285318.1767606121
• The cube root of 81406461990 is 4333.9739182711

Scales and comparisons

• 81,406,461,990 seconds is equal to 2,588 years, 24 weeks, 4 days, 10 hours, 6 minutes, 30 seconds.
• To count from 1 to 81,406,461,990 would take you about five thousand, one hundred seventy-six 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 81406461990 cubic inches would be around 361.2 feet tall.

Recreational maths with 81406461990

• 81406461990 backwards is 09916460418
• The number of decimal digits it has is: 11
• The sum of 81406461990's digits is 48
• More coming soon!