7155198981

Names of 7155198981

• Cardinal: 7155198981 can be written as Seven billion, one hundred fifty-five million, one hundred ninety-eight thousand, nine hundred eighty-one.

Scientific notation

• Scientific notation: 7.155198981 × 10⁹

Factors of 7155198981

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 148

Divisors of 7155198981

• Number of divisors d(n): 72
• Complete list of divisors:
  1 3 7 9 21 49 59 63 79 147 177 237 413 441 531 553 711 1239 1659 2891 3481 3717 3871 4661 4977 8673 10443 11613 13983 24367 26019 31329 32627 34839 41949 73101 97881 170569 205379 219303 228389 274999 293643 511707 616137 685167 824997 1437653 1535121 1848411 1924993 2055501 2474991 4312959 5774979 10063571 12938877 13474951 16224941 17324937 30190713 40424853 48674823 90572139 113574587 121274559 146024469 340723761 795022109 1022171283 2385066327 7155198981
• Sum of all divisors σ(n): 12384777600
• Sum of proper divisors (its aliquot sum) s(n): 5229578619
• 7155198981 is a deficient number, because the sum of its proper divisors (5229578619) is less than itself. Its deficiency is 1925620362

Bases of 7155198981

• Binary: 110101010011110111010110000000101₂
• Hexadecimal: 0x1AA7BAC05
• Base-36: 3AC0QV9

Squares and roots of 7155198981

• 7155198981 squared (7155198981²) is 51196872457703438361
• 7155198981 cubed (7155198981³) is 366323809639746607760823510141
• The square root of 7155198981 is 84588.4092591887
• The cube root of 7155198981 is 1926.9653492467

Scales and comparisons

• 7,155,198,981 seconds is equal to 227 years, 26 weeks, 4 days, 19 hours, 16 minutes, 21 seconds.
• To count from 1 to 7,155,198,981 would take you about four hundred fifty-five 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 7155198981 cubic inches would be around 160.6 feet tall.

Recreational maths with 7155198981

• 7155198981 backwards is 1898915517
• The number of decimal digits it has is: 10
• The sum of 7155198981's digits is 54
• More coming soon!