168491472921

Names of 168491472921

• Cardinal: 168491472921 can be written as One hundred sixty-eight billion, four hundred ninety-one million, four hundred seventy-two thousand, nine hundred twenty-one.

Scientific notation

• Scientific notation: 1.68491472921 × 10¹¹

Factors of 168491472921

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 82

Divisors of 168491472921

• Number of divisors d(n): 144
• Complete list of divisors:
  1 3 9 17 19 27 43 51 57 81 129 153 171 243 323 387 459 513 729 731 817 969 1161 1377 1539 1849 2187 2193 2451 2907 3483 4131 4617 5547 6561 6579 7353 8721 10449 12393 13851 13889 16641 19737 22059 26163 31347 31433 35131 37179 41553 41667 49923 59211 66177 78489 79507 94041 94299 105393 111537 124659 125001 149769 177633 198531 235467 238521 282123 282897 316179 375003 449307 532899 595593 597227 706401 715563 848691 948537 1125009 1347921 1351619 1510633 1598697 1786779 1791681 2119203 2146689 2546073 2845611 3375027 4043763 4054857 4531899 4796091 5360337 5375043 6440067 7638219 8536833 10125081 12131289 12164571 13595697 16125129 19320201 22914657 25610499 25680761 30375243 36493713 40787091 48375387 57960603 68743971 76831497 77042283 91125729 109481139 122361273 145126161 173881809 206231913 230494491 231126849 328443417 367083819 435378483 521645427 693380547 985330251 1101251457 1306135449 2080141641 2955990753 3303754371 3918406347 6240424923 8867972259 9911263113 18721274769 56163824307 168491472921
• Sum of all divisors σ(n): 288380664000
• Sum of proper divisors (its aliquot sum) s(n): 119889191079
• 168491472921 is a deficient number, because the sum of its proper divisors (119889191079) is less than itself. Its deficiency is 48602281842

Bases of 168491472921

• Binary: 10011100111010110111111101100000011001₂
• Hexadecimal: 0x273ADFD819
• Base-36: 25EJH0K9

Squares and roots of 168491472921

• 168491472921 squared (168491472921²) is 28389376447088076272241
• 168491472921 cubed (168491472921³) is 4783367852878615792526277075485961
• The square root of 168491472921 is 410477.1283774529
• The cube root of 168491472921 is 5523.2238148029

Scales and comparisons

• 168,491,472,921 seconds is equal to 5,357 years, 26 weeks, 2 days, 18 hours, 55 minutes, 21 seconds.
• To count from 1 to 168,491,472,921 would take you about ten thousand, seven hundred fifteen 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 168491472921 cubic inches would be around 460.3 feet tall.

Recreational maths with 168491472921

• 168491472921 backwards is 129274194861
• The number of decimal digits it has is: 12
• The sum of 168491472921's digits is 54
• More coming soon!