1991135718123825

Names of 1991135718123825

• Cardinal: 1991135718123825 can be written as One quadrillion, nine hundred ninety-one trillion, one hundred thirty-five billion, seven hundred eighteen million, one hundred twenty-three thousand, eight hundred twenty-five.

Scientific notation

• Scientific notation: 1.991135718123825 × 10¹⁵

Factors of 1991135718123825

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 4408

Divisors of 1991135718123825

• Number of divisors d(n): 216
• Complete list of divisors:
  1 3 5 7 13 15 21 25 35 39 65 75 91 105 127 175 195 273 325 381 455 525 635 889 975 1365 1651 1905 2275 2667 3175 4253 4445 4953 6825 8255 9525 11557 12759 13335 16129 21265 22225 24765 29771 34671 41275 48387 55289 57785 63795 66675 80645 89313 106325 112903 123825 148855 165867 173355 209677 241935 276445 288925 318975 338709 387023 403225 446565 540131 564515 629031 744275 829335 866775 1048385 1161069 1209675 1382225 1467739 1620393 1693545 1935115 2232825 2700655 2822575 3145155 3780917 4146675 4403217 5241925 5805345 7021703 7338695 8101965 8467725 9675575 11342751 13503275 15725775 18088009 18904585 21065109 22016085 29026725 35108515 36693475 40509825 49151921 54264027 56713755 68596637 90440045 94522925 105325545 110080425 126616063 147455763 175542575 205789911 235144117 245759605 271320135 283568775 342983185 379848189 452200225 480176459 526627725 633080315 705432351 737278815 891756281 1028949555 1175720585 1228798025 1356600675 1440529377 1646008819 1714915925 1899240945 2297177143 2400882295 2675268843 3165401575 3527161755 3686394075 4458781405 4938026457 5144747775 5878602925 6242293967 6891531429 7202646885 8230044095 9496204725 11485885715 12004411475 13376344215 16080240001 17635808775 18726881901 22293907025 24690132285 29863302859 31211469835 34457657145 36013234425 41150220475 48240720003 57429428575 66881721075 80401200005 89589908577 93634409505 123450661425 149316514295 156057349175 172288285725 209043120013 241203600015 291741497161 402006000025 447949542885 468172047525 627129360039 746582571475 875224491483 1045215600065 1206018000075 1458707485805 2042190480127 2239747714425 3135646800195 3792639463093 4376122457415 5226078000325 6126571440381 7293537429025 10210952400635 11377918389279 15678234000975 18963197315465 21880612287075 26548476241651 30632857201905 51054762003175 56889591946395 79645428724953 94815986577325 132742381208255 153164286009525 284447959731975 398227143624765 663711906041275 1991135718123825
• Sum of all divisors σ(n): 4084820771279808
• Sum of proper divisors (its aliquot sum) s(n): 2093685053155983
• 1991135718123825 is an abundant number, because the sum of its proper divisors (2093685053155983) is greater than itself. Its abundance is 102549335032158

Bases of 1991135718123825

• Binary: 111000100101110110101101001001011011010100100110001₂
• Hexadecimal: 0x712ED692DA931
• Base-36: JLSR4CYXBL

Squares and roots of 1991135718123825

• 1991135718123825 squared (1991135718123825²) is 3964621447988480284578032630625
• 1991135718123825 cubed (1991135718123825³) is 7894099373929661597959298900244813054237140625
• The square root of 1991135718123825 is 44622143.8091428435
• The cube root of 1991135718123825 is 125805.6910578941

Scales and comparisons

• 1,991,135,718,123,825 seconds is equal to 63,311,956 years, 44 weeks, 1 day, 2 hours, 23 minutes, 45 seconds.
• To count from 1 to 1,991,135,718,123,825 would take you about one hundred eighty-nine million, nine hundred thirty-five thousand, eight hundred seventy 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 1991135718123825 cubic inches would be around 10483.8 feet tall.

Recreational maths with 1991135718123825

• 1991135718123825 backwards is 5283218175311991
• The number of decimal digits it has is: 16
• The sum of 1991135718123825's digits is 66
• More coming soon!