642827257939177921

Names of 642827257939177921

• Cardinal: 642827257939177921 can be written as Six hundred forty-two quadrillion, eight hundred twenty-seven trillion, two hundred fifty-seven billion, nine hundred thirty-nine million, one hundred seventy-seven thousand, nine hundred twenty-one.

Scientific notation

• Scientific notation: 6.42827257939177921 × 10¹⁷

Factors of 642827257939177921

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 929

Divisors of 642827257939177921

• Number of divisors d(n): 7
• Complete list of divisors:
  1 929 863041 801765089 744839767681 691956144175649 642827257939177921
• Sum of all divisors σ(n): 643519959725750311
• Sum of proper divisors (its aliquot sum) s(n): 692701786572390
• 642827257939177921 is a deficient number, because the sum of its proper divisors (692701786572390) is less than itself. Its deficiency is 642134556152605531

Bases of 642827257939177921

• Binary: 100011101011110001111111110000111001011001110011000111000001₂
• Hexadecimal: 0x8EBC7FC396731C1
• Base-36: 4VTJ8THH14G1

Squares and roots of 642827257939177921

• 642827257939177921 squared (642827257939177921²) is 413226883549602383464840561293882241
• 642827257939177921 cubed (642827257939177921³) is 265633504458942888996790280838040426815504330121200961
• 642827257939177921 is a perfect square number. Its square root is 801765089
• 642827257939177921 is a perfect cube number. Its cube root is 863041
• Being both a perfect square and a perfect cube, 642827257939177921 is also a perfect sixth number.

Scales and comparisons

• 642,827,257,939,177,921 seconds is equal to 20,439,918,407 years, 10 weeks, 3 days, 23 hours, 12 minutes, 1 second.
• To count from 1 to 642,827,257,939,177,921 would take you about sixty-one billion, three hundred nineteen million, seven hundred fifty-five thousand, two hundred twenty-one 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 642827257939177921 cubic inches would be around 71920.1 feet tall.

Recreational maths with 642827257939177921

• 642827257939177921 backwards is 129771939752728246
• The number of decimal digits it has is: 18
• The sum of 642827257939177921's digits is 91
• More coming soon!