81635949072

Names of 81635949072

• Cardinal: 81635949072 can be written as Eighty-one billion, six hundred thirty-five million, nine hundred forty-nine thousand and seventy-two.

Scientific notation

• Scientific notation: 8.1635949072 × 10¹⁰

Factors of 81635949072

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 18287659

Divisors of 81635949072

• Number of divisors d(n): 60
• Complete list of divisors:
  1 2 3 4 6 8 9 12 16 18 24 31 36 48 62 72 93 124 144 186 248 279 372 496 558 744 1116 1488 2232 4464 18287623 36575246 54862869 73150492 109725738 146300984 164588607 219451476 292601968 329177214 438902952 566916313 658354428 877805904 1133832626 1316708856 1700748939 2267665252 2633417712 3401497878 4535330504 5102246817 6802995756 9070661008 10204493634 13605991512 20408987268 27211983024 40817974536 81635949072
• Sum of all divisors σ(n): 235837199104
• Sum of proper divisors (its aliquot sum) s(n): 154201250032
• 81635949072 is an abundant number, because the sum of its proper divisors (154201250032) is greater than itself. Its abundance is 72565300960

Bases of 81635949072

• Binary: 1001100000001111000011011101000010000₂
• Hexadecimal: 0x1301E1BA10
• Base-36: 11I3XPG0

Squares and roots of 81635949072

• 81635949072 squared (81635949072²) is 6664428180886177661184
• 81635949072 cubed (81635949072³) is 544056919568825603377161095221248
• The square root of 81635949072 is 285720.0536749215
• The cube root of 81635949072 is 4338.0426284257

Scales and comparisons

• 81,635,949,072 seconds is equal to 2,595 years, 40 weeks, 12 hours, 31 minutes, 12 seconds.
• To count from 1 to 81,635,949,072 would take you about five thousand, one hundred ninety-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 81635949072 cubic inches would be around 361.5 feet tall.

Recreational maths with 81635949072

• 81635949072 backwards is 27094953618
• The number of decimal digits it has is: 11
• The sum of 81635949072's digits is 54
• More coming soon!