78457496721

Names of 78457496721

• Cardinal: 78457496721 can be written as Seventy-eight billion, four hundred fifty-seven million, four hundred ninety-six thousand, seven hundred twenty-one.

Scientific notation

• Scientific notation: 7.8457496721 × 10¹⁰

Factors of 78457496721

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 3438

Divisors of 78457496721

• Number of divisors d(n): 64
• Complete list of divisors:
  1 3 31 41 43 93 123 129 151 453 1271 1333 1763 3169 3813 3999 4681 5289 6191 6493 9507 14043 18573 19479 54653 98239 129929 136267 163959 191921 201283 266213 294717 389787 408801 478519 575763 603849 798639 1435557 4027799 4224277 5586947 8252603 12083397 12672831 14834089 16760841 19619279 20576317 24757809 44502267 58857837 61728951 173195357 519586071 608197649 637865827 843628997 1824592947 1913597481 2530886991 26152498907 78457496721
• Sum of all divisors σ(n): 113976360960
• Sum of proper divisors (its aliquot sum) s(n): 35518864239
• 78457496721 is a deficient number, because the sum of its proper divisors (35518864239) is less than itself. Its deficiency is 42938632482

Bases of 78457496721

• Binary: 1001001000100011011100110010010010001₂
• Hexadecimal: 0x12446E6491
• Base-36: 101JKFWX

Squares and roots of 78457496721

• 78457496721 squared (78457496721²) is 6155578791725725751841
• 78457496721 cubed (78457496721³) is 482951302867678270106410517213361
• The square root of 78457496721 is 280102.6538985305
• The cube root of 78457496721 is 4280.9959382207

Scales and comparisons

• 78,457,496,721 seconds is equal to 2,494 years, 36 weeks, 4 days, 21 hours, 5 minutes, 21 seconds.
• To count from 1 to 78,457,496,721 would take you about four thousand, nine hundred eighty-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 78457496721 cubic inches would be around 356.7 feet tall.

Recreational maths with 78457496721

• 78457496721 backwards is 12769475487
• The number of decimal digits it has is: 11
• The sum of 78457496721's digits is 60
• More coming soon!