840540651278421681

Names of 840540651278421681

• Cardinal: 840540651278421681 can be written as Eight hundred forty quadrillion, five hundred forty trillion, six hundred fifty-one billion, two hundred seventy-eight million, four hundred twenty-one thousand, six hundred eighty-one.

Scientific notation

• Scientific notation: 8.40540651278421681 × 10¹⁷

Factors of 840540651278421681

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 10214

Divisors of 840540651278421681

• Number of divisors d(n): 135
• Complete list of divisors:
  1 3 7 9 21 49 63 147 343 441 653 1029 1959 2401 3087 4571 5877 7203 9551 13713 21609 28653 31997 41139 66857 85959 95991 200571 223979 287973 426409 467999 601713 671937 1279227 1403997 1567853 2015811 2984863 3275993 3837681 4211991 4703559 6236803 8954589 9827979 14110677 18710409 20894041 22931951 26863767 29483937 43657621 56131227 62682123 68795853 91221601 130972863 146258287 188046369 206387559 273664803 305603347 392918589 438774861 638551207 820994409 916810041 1023808009 1316324583 1915653621 2139223429 2750430123 3071424027 4072632359 4469858449 5746960863 6417670287 9214272081 12217897077 13409575347 14974564003 19253010861 28508426513 31289009143 36653691231 40228726041 44923692009 59567705453 85525279539 93867027429 134771076027 178703116359 199558985591 219023064001 256575838617 281601082287 416973938171 536109349077 598676956773 657069192003 1250921814513 1396912899137 1796030870319 1971207576009 2918817567197 3752765443539 4190738697411 8756452701591 9778390293959 12572216092233 20431722970379 26269358104773 29335170881877 38897711660809 61295168911137 88005512645631 116693134982427 143022060792653 183885506733411 272283981625663 350079404947281 429066182377959 816851944876989 1287198547133877 1905987871379641 2450555834630967 5717963614138923 13341915099657487 17153890842416769 40025745298972461 93393405697602409 120077235896917383 280180217092807227 840540651278421681
• Sum of all divisors σ(n): 1418703274977076907
• Sum of proper divisors (its aliquot sum) s(n): 578162623698655226
• 840540651278421681 is a deficient number, because the sum of its proper divisors (578162623698655226) is less than itself. Its deficiency is 262378027579766455

Bases of 840540651278421681

• Binary: 101110101010001100110100010011011010101110011100111010110001₂
• Hexadecimal: 0xBAA3344DAB9CEB1
• Base-36: 6DWASKHIOD69

Squares and roots of 840540651278421681

• 840540651278421681 squared (840540651278421681²) is 706508586451553283078027294450865761
• 840540651278421681 cubed (840540651278421681³) is 593849187389785684800367636009152607749442428082964241
• 840540651278421681 is a perfect square number. Its square root is 916810041
• The cube root of 840540651278421681 is 943741.1833851373

Scales and comparisons

• 840,540,651,278,421,681 seconds is equal to 26,726,592,747 years, 36 weeks, 6 days, 22 hours, 1 minute, 21 seconds.
• To count from 1 to 840,540,651,278,421,681 would take you about eighty billion, one hundred seventy-nine million, seven hundred seventy-eight thousand, two hundred forty-three 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 840540651278421681 cubic inches would be around 78645.1 feet tall.

Recreational maths with 840540651278421681

• 840540651278421681 backwards is 186124872156045048
• The number of decimal digits it has is: 18
• The sum of 840540651278421681's digits is 72
• More coming soon!