81188133208

Names of 81188133208

• Cardinal: 81188133208 can be written as Eighty-one billion, one hundred eighty-eight million, one hundred thirty-three thousand, two hundred eight.

Scientific notation

• Scientific notation: 8.1188133208 × 10¹⁰

Factors of 81188133208

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 2633

Divisors of 81188133208

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 4 7 8 13 14 26 28 52 56 91 97 104 182 194 364 388 601 679 728 776 1202 1261 1358 1913 2404 2522 2716 3826 4207 4808 5044 5432 7652 7813 8414 8827 10088 13391 15304 15626 16828 17654 24869 26782 31252 33656 35308 49738 53564 54691 58297 62504 70616 99476 107128 109382 116594 174083 185561 198952 218764 233188 348166 371122 408079 437528 466376 696332 742244 757861 816158 1149713 1298927 1392664 1484488 1515722 1632316 2299426 2412293 2597854 3031444 3264632 4598852 4824586 5195708 5305027 6062888 8047991 9197704 9649172 10391416 10610054 14946269 16095982 16886051 19298344 21220108 29892538 32191964 33772102 42440216 59785076 64383928 67544204 104623883 111522161 119570152 135088408 209247766 223044322 418495532 446088644 780655127 836991064 892177288 1449788093 1561310254 2899576186 3122620508 5799152372 6245241016 10148516651 11598304744 20297033302 40594066604 81188133208
• Sum of all divisors σ(n): 189702817920
• Sum of proper divisors (its aliquot sum) s(n): 108514684712
• 81188133208 is an abundant number, because the sum of its proper divisors (108514684712) is greater than itself. Its abundance is 27326551504

Bases of 81188133208

• Binary: 1001011100111001100001001100101011000₂
• Hexadecimal: 0x12E7309958
• Base-36: 11APBGIG

Squares and roots of 81188133208

• 81188133208 squared (81188133208²) is 6591512973799952371264
• 81188133208 cubed (81188133208³) is 535152633359130747062237103334912
• The square root of 81188133208 is 284935.3140767219
• The cube root of 81188133208 is 4330.0959360893

Scales and comparisons

• 81,188,133,208 seconds is equal to 2,581 years, 27 weeks, 4 days, 11 hours, 13 minutes, 28 seconds.
• To count from 1 to 81,188,133,208 would take you about five thousand, one hundred sixty-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 81188133208 cubic inches would be around 360.8 feet tall.

Recreational maths with 81188133208

• 81188133208 backwards is 80233188118
• The number of decimal digits it has is: 11
• The sum of 81188133208's digits is 43
• More coming soon!