81301512942

Names of 81301512942

• Cardinal: 81301512942 can be written as Eighty-one billion, three hundred one million, five hundred twelve thousand, nine hundred forty-two.

Scientific notation

• Scientific notation: 8.1301512942 × 10¹⁰

Factors of 81301512942

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 59790

Divisors of 81301512942

• Number of divisors d(n): 80
• Complete list of divisors:
  1 2 3 6 9 13 18 26 27 39 54 78 81 117 162 234 351 653 702 1053 1306 1959 2106 3918 5877 8489 11754 16978 17631 25467 35262 50934 52893 59119 76401 105786 118238 152802 177357 229203 354714 458406 532071 687609 768547 1064142 1375218 1537094 1596213 2305641 3192426 4611282 4788639 6916923 9577278 13833846 20750769 38604707 41501538 62252307 77209414 115814121 124504614 231628242 347442363 501861191 694884726 1003722382 1042327089 1505583573 2084654178 3011167146 3126981267 4516750719 6253962534 9033501438 13550252157 27100504314 40650756471 81301512942
• Sum of all divisors σ(n): 196492887360
• Sum of proper divisors (its aliquot sum) s(n): 115191374418
• 81301512942 is an abundant number, because the sum of its proper divisors (115191374418) is greater than itself. Its abundance is 33889861476

Bases of 81301512942

• Binary: 1001011101101111100101010001011101110₂
• Hexadecimal: 0x12EDF2A2EE
• Base-36: 11CKTKVI

Squares and roots of 81301512942

• 81301512942 squared (81301512942²) is 6609936006658193495364
• 81301512942 cubed (81301512942³) is 537397797791112916633676463000888
• The square root of 81301512942 is 285134.2016349495
• The cube root of 81301512942 is 4332.1106671723

Scales and comparisons

• 81,301,512,942 seconds is equal to 2,585 years, 7 weeks, 17 hours, 35 minutes, 42 seconds.
• To count from 1 to 81,301,512,942 would take you about five thousand, one hundred seventy 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 81301512942 cubic inches would be around 361 feet tall.

Recreational maths with 81301512942

• 81301512942 backwards is 24921510318
• The number of decimal digits it has is: 11
• The sum of 81301512942's digits is 36
• More coming soon!