81131741920

Names of 81131741920

• Cardinal: 81131741920 can be written as Eighty-one billion, one hundred thirty-one million, seven hundred forty-one thousand, nine hundred twenty.

Scientific notation

• Scientific notation: 8.113174192 × 10¹⁰

Factors of 81131741920

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 1160400

Divisors of 81131741920

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 4 5 8 10 16 19 20 23 32 38 40 46 76 80 92 95 115 152 160 184 190 230 304 368 380 437 460 608 736 760 874 920 1520 1748 1840 2185 3040 3496 3680 4370 6992 8740 13984 17480 34960 69920 1160351 2320702 4641404 5801755 9282808 11603510 18565616 22046669 23207020 26688073 37131232 44093338 46414040 53376146 88186676 92828080 106752292 110233345 133440365 176373352 185656160 213504584 220466690 266880730 352746704 427009168 440933380 507073387 533761460 705493408 854018336 881866760 1014146774 1067522920 1763733520 2028293548 2135045840 2535366935 3527467040 4056587096 4270091680 5070733870 8113174192 10141467740 16226348384 20282935480 40565870960 81131741920
• Sum of all divisors σ(n): 210534266880
• Sum of proper divisors (its aliquot sum) s(n): 129402524960
• 81131741920 is an abundant number, because the sum of its proper divisors (129402524960) is greater than itself. Its abundance is 48270783040

Bases of 81131741920

• Binary: 1001011100011110101000010001011100000₂
• Hexadecimal: 0x12E3D422E0
• Base-36: 119RQSPS

Squares and roots of 81131741920

• 81131741920 squared (81131741920²) is 6582359546973485286400
• 81131741920 cubed (81131741920³) is 534038295989700925339122085888000
• The square root of 81131741920 is 284836.3423441607
• The cube root of 81131741920 is 4329.0931777103

Scales and comparisons

• 81,131,741,920 seconds is equal to 2,579 years, 38 weeks, 2 days, 18 hours, 58 minutes, 40 seconds.
• To count from 1 to 81,131,741,920 would take you about five thousand, one hundred fifty-nine 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 81131741920 cubic inches would be around 360.8 feet tall.

Recreational maths with 81131741920

• 81131741920 backwards is 02914713118
• The number of decimal digits it has is: 11
• The sum of 81131741920's digits is 37
• More coming soon!