168068621721

Names of 168068621721

• Cardinal: 168068621721 can be written as One hundred sixty-eight billion, sixty-eight million, six hundred twenty-one thousand, seven hundred twenty-one.

Scientific notation

• Scientific notation: 1.68068621721 × 10¹¹

Factors of 168068621721

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 4271

Divisors of 168068621721

• Number of divisors d(n): 128
• Complete list of divisors:
  1 3 7 11 13 17 21 33 39 51 77 91 119 143 187 221 231 273 357 429 561 663 1001 1033 1309 1547 2431 3003 3099 3187 3927 4641 7231 7293 9561 11363 13429 17017 17561 21693 22309 34089 35057 40287 41431 51051 52683 54179 66927 79541 94003 105171 122927 124293 147719 162537 193171 228293 238623 245399 282009 290017 368781 379253 443157 455741 579513 595969 684879 704327 736197 870051 1034033 1137759 1352197 1367223 1598051 1787907 2112981 2511223 3102099 3190187 3292171 4056591 4171783 4794153 4930289 7533669 7747597 9570561 9876513 12515349 14790867 17578561 23045197 23242791 36213881 42798223 52735683 54233179 55966907 69135591 108641643 128394669 162699537 167900721 253497167 299587561 391768349 470780453 615635977 727569791 760491501 898762683 1175305047 1412341359 1846907931 2182709373 3295463171 4309451839 5092988537 8003267701 9886389513 12928355517 15278965611 24009803103 56022873907 168068621721
• Sum of all divisors σ(n): 318985261056
• Sum of proper divisors (its aliquot sum) s(n): 150916639335
• 168068621721 is a deficient number, because the sum of its proper divisors (150916639335) is less than itself. Its deficiency is 17151982386

Bases of 168068621721

• Binary: 10011100100001101010111010010110011001₂
• Hexadecimal: 0x2721ABA599
• Base-36: 257JPUHL

Squares and roots of 168068621721

• 168068621721 squared (168068621721²) is 28247061607196593001841
• 168068621721 cubed (168068621721³) is 4747444711989706480506410885588361
• The square root of 168068621721 is 409961.7320201973
• The cube root of 168068621721 is 5518.5995287699

Scales and comparisons

• 168,068,621,721 seconds is equal to 5,344 years, 3 weeks, 1 day, 16 hours, 15 minutes, 21 seconds.
• To count from 1 to 168,068,621,721 would take you about ten thousand, six hundred eighty-eight 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 168068621721 cubic inches would be around 459.9 feet tall.

Recreational maths with 168068621721

• 168068621721 backwards is 127126860861
• The number of decimal digits it has is: 12
• The sum of 168068621721's digits is 48
• More coming soon!