81442989375

Names of 81442989375

• Cardinal: 81442989375 can be written as Eighty-one billion, four hundred forty-two million, nine hundred eighty-nine thousand, three hundred seventy-five.

Scientific notation

• Scientific notation: 8.1442989375 × 10¹⁰

Factors of 81442989375

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 253

Divisors of 81442989375

• Number of divisors d(n): 320
• Complete list of divisors:
  1 3 5 11 15 19 25 33 37 41 55 57 75 95 111 123 125 137 165 185 205 209 275 285 375 407 411 451 475 555 615 625 627 685 703 779 825 925 1025 1045 1221 1353 1375 1425 1507 1517 1875 2035 2055 2109 2255 2337 2375 2603 2775 3075 3135 3425 3515 3895 4125 4521 4551 4625 5069 5125 5225 5617 6105 6765 6875 7125 7535 7585 7733 7809 8569 10175 10275 10545 11275 11685 11875 13015 13875 15207 15375 15675 16687 16851 17125 17575 19475 20625 22605 22755 23125 23199 25345 25625 25707 26125 28085 28633 28823 30525 33825 35625 37675 37925 38665 39045 42845 50061 50875 51375 52725 55759 56375 58425 61787 65075 69375 76035 76875 78375 83435 84255 85625 85899 86469 87875 96311 97375 106723 113025 113775 115995 126725 128535 130625 140425 143165 144115 152625 167277 169125 185361 188375 189625 193325 195225 207829 214225 250305 254375 256875 263625 278795 281875 288933 292125 308935 317053 320169 325375 380175 391875 417175 421275 429495 432345 439375 481555 486875 533615 565125 568875 579975 623487 633625 642675 702125 715825 720575 763125 836385 845625 926805 941875 948125 951159 966625 976125 1039145 1059421 1071125 1173953 1251525 1318125 1393975 1444665 1460625 1544675 1585265 1600845 1626875 1900875 2085875 2106375 2147475 2161725 2286119 2407775 2668075 2825625 2844375 2899875 3117435 3168125 3178263 3213375 3510625 3521859 3579125 3602875 3948751 4181925 4634025 4755795 4833125 4880625 5195725 5297105 5355625 5869765 6257625 6858357 6969875 7223325 7723375 7926325 8004225 9504375 10429375 10531875 10737375 10808625 11430595 11846253 12038875 13340375 14499375 15587175 15891315 16066875 17609295 17895625 18014375 19743755 20909625 23170125 23778975 25978625 26485525 29348825 31288125 34291785 34849375 36116625 38616875 39631625 40021125 43436261 53686875 54043125 57152975 59231265 60194375 66701875 77935875 79456575 88046475 98718775 104548125 115850625 118894875 129893125 130308783 132427625 146744125 171458925 180583125 198158125 200105625 217181305 285764875 296156325 389679375 397282875 440232375 493593875 594474375 651543915 662138125 733720625 857294625 1085906525 1428824375 1480781625 1986414375 2201161875 2467969375 3257719575 4286473125 5429532625 7403908125 16288597875 27147663125 81442989375
• Sum of all divisors σ(n): 165133140480
• Sum of proper divisors (its aliquot sum) s(n): 83690151105
• 81442989375 is an abundant number, because the sum of its proper divisors (83690151105) is greater than itself. Its abundance is 2247161730

Bases of 81442989375

• Binary: 1001011110110011000010110010100111111₂
• Hexadecimal: 0x12F661653F
• Base-36: 11EX1WSF

Squares and roots of 81442989375

• 81442989375 squared (81442989375²) is 6632960518336362890625
• 81442989375 cubed (81442989375³) is 540208133019662895577316162109375
• The square root of 81442989375 is 285382.1812499863
• The cube root of 81442989375 is 4334.6220447957

Scales and comparisons

• 81,442,989,375 seconds is equal to 2,589 years, 33 weeks, 4 hours, 36 minutes, 15 seconds.
• To count from 1 to 81,442,989,375 would take you about five thousand, one hundred seventy-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 81442989375 cubic inches would be around 361.2 feet tall.

Recreational maths with 81442989375

• 81442989375 backwards is 57398924418
• The number of decimal digits it has is: 11
• The sum of 81442989375's digits is 60
• More coming soon!