81321968182

Names of 81321968182

• Cardinal: 81321968182 can be written as Eighty-one billion, three hundred twenty-one million, nine hundred sixty-eight thousand, one hundred eighty-two.

Scientific notation

• Scientific notation: 8.1321968182 × 10¹⁰

Factors of 81321968182

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 400

Divisors of 81321968182

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 7 13 14 26 91 97 169 182 194 281 338 562 679 1183 1261 1358 1967 2197 2366 2522 3653 3934 4394 7306 8827 9409 15379 16393 17654 18818 25571 27257 30758 32786 47489 51142 54514 65863 94978 114751 122317 131726 190799 213109 229502 244634 332423 354341 381598 426218 617357 664846 708682 856219 1234714 1491763 1590121 1712438 2480387 2643929 2983526 3180242 4321499 4606433 4960774 5287858 8642998 9212866 11130847 18507503 20671573 22261694 32245031 34371077 37015006 41343146 59883629 64490062 68742154 119767258 144701011 240597539 289402022 419185403 446824001 481195078 838370806 893648002 3127768007 5808712013 6255536014 11617424026 40660984091 81321968182
• Sum of all divisors σ(n): 153137234880
• Sum of proper divisors (its aliquot sum) s(n): 71815266698
• 81321968182 is a deficient number, because the sum of its proper divisors (71815266698) is less than itself. Its deficiency is 9506701484

Bases of 81321968182

• Binary: 1001011101111001010101100001000110110₂
• Hexadecimal: 0x12EF2AC236
• Base-36: 11CX008M

Squares and roots of 81321968182

• 81321968182 squared (81321968182²) is 6613262508994220385124
• 81321968182 cubed (81321968182³) is 537803523335641478980949714124568
• The square root of 81321968182 is 285170.0688746979
• The cube root of 81321968182 is 4332.4739524689

Scales and comparisons

• 81,321,968,182 seconds is equal to 2,585 years, 40 weeks, 6 days, 11 hours, 36 minutes, 22 seconds.
• To count from 1 to 81,321,968,182 would take you about five thousand, one hundred seventy-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 81321968182 cubic inches would be around 361 feet tall.

Recreational maths with 81321968182

• 81321968182 backwards is 28186912318
• The number of decimal digits it has is: 11
• The sum of 81321968182's digits is 49
• More coming soon!