81683901240

Names of 81683901240

• Cardinal: 81683901240 can be written as Eighty-one billion, six hundred eighty-three million, nine hundred one thousand, two hundred forty.

Scientific notation

• Scientific notation: 8.168390124 × 10¹⁰

Factors of 81683901240

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 3509

Divisors of 81683901240

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 3 4 5 6 8 10 12 15 20 24 30 40 60 120 281 562 843 1124 1201 1405 1686 2017 2248 2402 2810 3372 3603 4034 4215 4804 5620 6005 6051 6744 7206 8068 8430 9608 10085 11240 12010 12102 14412 16136 16860 18015 20170 24020 24204 28824 30255 33720 36030 40340 48040 48408 60510 72060 80680 121020 144120 242040 337481 566777 674962 1012443 1133554 1349924 1687405 1700331 2024886 2267108 2422417 2699848 2833885 3374810 3400662 4049772 4534216 4844834 5062215 5667770 6749620 6801324 7267251 8099544 8501655 9689668 10124430 11335540 12112085 13499240 13602648 14534502 17003310 19379336 20248860 22671080 24224170 29069004 34006620 36336255 40497720 48448340 58138008 68013240 72672510 96896680 145345020 290690040 680699177 1361398354 2042097531 2722796708 3403495885 4084195062 5445593416 6806991770 8168390124 10210487655 13613983540 16336780248 20420975310 27227967080 40841950620 81683901240
• Sum of all divisors σ(n): 246250566720
• Sum of proper divisors (its aliquot sum) s(n): 164566665480
• 81683901240 is an abundant number, because the sum of its proper divisors (164566665480) is greater than itself. Its abundance is 82882764240

Bases of 81683901240

• Binary: 1001100000100101111010110101100111000₂
• Hexadecimal: 0x1304BD6B38
• Base-36: 11IWHHKO

Squares and roots of 81683901240

• 81683901240 squared (81683901240²) is 6672259721786073537600
• 81683901240 cubed (81683901240³) is 545016204162003507252695826624000
• The square root of 81683901240 is 285803.9559558265
• The cube root of 81683901240 is 4338.8918369553

Scales and comparisons

• 81,683,901,240 seconds is equal to 2,597 years, 15 weeks, 2 days, 12 hours, 34 minutes.
• To count from 1 to 81,683,901,240 would take you about five thousand, one hundred ninety-four 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 81683901240 cubic inches would be around 361.6 feet tall.

Recreational maths with 81683901240

• 81683901240 backwards is 04210938618
• The number of decimal digits it has is: 11
• The sum of 81683901240's digits is 42
• More coming soon!