642641639905420

Names of 642641639905420

• Cardinal: 642641639905420 can be written as Six hundred forty-two trillion, six hundred forty-one billion, six hundred thirty-nine million, nine hundred five thousand, four hundred twenty.

Scientific notation

• Scientific notation: 6.4264163990542 × 10¹⁴

Factors of 642641639905420

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 174981

Divisors of 642641639905420

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 4 5 10 20 31 62 124 155 181 310 362 620 724 905 1810 3620 5611 11222 22444 28055 43691 56110 87382 112220 131071 174764 218455 262142 436910 524284 655355 873820 1310710 1354421 2621420 2708842 4063201 5417684 6772105 7908071 8126402 13544210 15816142 16252804 20316005 23723851 27088420 31632284 39540355 40632010 47447702 79080710 81264020 94895404 118619255 158161420 237238510 245150201 474477020 490300402 735439381 980600804 1225751005 1470878762 2451502010 2941757524 3677196905 4903004020 5726623061 7354393810 11453246122 14708787620 22906492244 28633115305 57266230610 114532461220 177525314891 355050629782 710101259564 887626574455 1036518774041 1775253148910 2073037548082 3550506297820 4146075096164 5182593870205 10365187740410 20730375480820 32132081995271 64264163990542 128528327981084 160660409976355 321320819952710 642641639905420
• Sum of all divisors σ(n): 1400820562132992
• Sum of proper divisors (its aliquot sum) s(n): 758178922227572
• 642641639905420 is an abundant number, because the sum of its proper divisors (758178922227572) is greater than itself. Its abundance is 115537282322152

Bases of 642641639905420

• Binary: 10010010000111101010101010101010100001100010001100₂
• Hexadecimal: 0x2487AAAAA188C
• Base-36: 6BSPHRVTZG

Squares and roots of 642641639905420

• 642641639905420 squared (642641639905420²) is 412988277340327507386545376400
• 642641639905420 cubed (642641639905420³) is 265403463811702476213153458975493834300088000
• The square root of 642641639905420 is 25350377.5101164915
• The cube root of 642641639905420 is 86295.7923562813

Scales and comparisons

• 642,641,639,905,420 seconds is equal to 20,434,016 years, 17 weeks, 8 hours, 23 minutes, 40 seconds.
• To count from 1 to 642,641,639,905,420 would take you about fifty-one million, eighty-five thousand and forty 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 642641639905420 cubic inches would be around 7191.3 feet tall.

Recreational maths with 642641639905420

• 642641639905420 backwards is 024509936146246
• The number of decimal digits it has is: 15
• The sum of 642641639905420's digits is 61
• More coming soon!