8420791747221

Names of 8420791747221

• Cardinal: 8420791747221 can be written as Eight trillion, four hundred twenty billion, seven hundred ninety-one million, seven hundred forty-seven thousand, two hundred twenty-one.

Scientific notation

• Scientific notation: 8.420791747221 × 10¹²

Factors of 8420791747221

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 873616766

Divisors of 8420791747221

• Number of divisors d(n): 40
• Complete list of divisors:
  1 3 7 9 17 21 27 51 63 81 119 153 189 357 459 567 1071 1377 3213 9639 873616739 2620850217 6115317173 7862550651 14851484563 18345951519 23587651953 44554453689 55037854557 70762955859 103960391941 133663361067 165113563671 311881175823 400990083201 495340691013 935643527469 1202970249603 2806930582407 8420791747221
• Sum of all divisors σ(n): 15221898077760
• Sum of proper divisors (its aliquot sum) s(n): 6801106330539
• 8420791747221 is a deficient number, because the sum of its proper divisors (6801106330539) is less than itself. Its deficiency is 1619685416682

Bases of 8420791747221

• Binary: 1111010100010011110010011010000001010010101₂
• Hexadecimal: 0x7A89E4D0295
• Base-36: 2ZGGHZKB9

Squares and roots of 8420791747221

• 8420791747221 squared (8420791747221²) is 70909733650065301961222841
• 8420791747221 cubed (8420791747221³) is 597116099918109131902792645254123474861
• The square root of 8420791747221 is 2901860.0495580417
• The cube root of 8420791747221 is 20344.6852665809

Scales and comparisons

• 8,420,791,747,221 seconds is equal to 267,755 years, 6 weeks, 5 days, 10 hours, 40 minutes, 21 seconds.
• To count from 1 to 8,420,791,747,221 would take you about six hundred sixty-nine thousand, three hundred eighty-seven 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 8420791747221 cubic inches would be around 1695.4 feet tall.

Recreational maths with 8420791747221

• 8420791747221 backwards is 1227471970248
• The number of decimal digits it has is: 13
• The sum of 8420791747221's digits is 54
• More coming soon!