991680120848209

Names of 991680120848209

• Cardinal: 991680120848209 can be written as Nine hundred ninety-one trillion, six hundred eighty billion, one hundred twenty million, eight hundred forty-eight thousand, two hundred nine.

Scientific notation

• Scientific notation: 9.91680120848209 × 10¹⁴

Factors of 991680120848209

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 240

Divisors of 991680120848209

• Number of divisors d(n): 135
• Complete list of divisors:
  1 13 17 97 113 169 221 289 1261 1469 1649 1921 2197 2873 3757 9409 10961 12769 16393 19097 21437 24973 28033 28561 32657 37349 48841 122317 142493 159953 165997 186337 213109 217073 248261 278681 324649 364429 424541 485537 634933 1063217 1238593 1590121 1852409 2079389 2157961 2422381 2719201 2770417 2821949 3167729 3227393 3622853 3690241 4220437 4737577 5519033 8254129 13821821 16101709 18074689 20671573 21056081 24081317 27032057 28053493 31490953 35349613 36685337 41180477 47097089 47973133 54865681 61588501 71747429 120143521 179683673 209322217 234970957 268730449 273729053 307269713 313057121 351416741 357953377 364695409 409382389 459544969 476909381 535346201 623650729 800650513 932716577 1561865773 2042439857 2335887749 2721188821 3054622441 3558477689 3994506269 4568417633 4653393901 5321971057 5974084597 6199821953 6959500613 8107459477 20304255049 26551718141 30366540737 34721477569 35375454673 39710091733 46260209957 51928581497 60494120713 77663099761 90473507969 105396973201 263955315637 345172335833 451379208397 516231192529 601382729441 675071559461 786423569269 3431419103281 4487240365829 5867929709161 8775930272993 10223506400497 58334124755777 76283086219093 991680120848209
• Sum of all divisors σ(n): 1163411150728047
• Sum of proper divisors (its aliquot sum) s(n): 171731029879838
• 991680120848209 is a deficient number, because the sum of its proper divisors (171731029879838) is less than itself. Its deficiency is 819949090968371

Bases of 991680120848209

• Binary: 11100001011110110110000101010101010111111101010001₂
• Hexadecimal: 0x385ED85557F51
• Base-36: 9RIRK3J49D

Squares and roots of 991680120848209

• 991680120848209 squared (991680120848209²) is 983429462085518406529618507681
• 991680120848209 cubed (991680120848209³) is 975247447806656064255596347335396186501593329
• 991680120848209 is a perfect square number. Its square root is 31490953
• The cube root of 991680120848209 is 99721.8980046959

Scales and comparisons

• 991,680,120,848,209 seconds is equal to 31,532,360 years, 19 weeks, 3 days, 11 hours, 36 minutes, 49 seconds.
• To count from 1 to 991,680,120,848,209 would take you about seventy-eight million, eight hundred thirty thousand, nine hundred 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 991680120848209 cubic inches would be around 8310.2 feet tall.

Recreational maths with 991680120848209

• 991680120848209 backwards is 902848021086199
• The number of decimal digits it has is: 15
• The sum of 991680120848209's digits is 67
• More coming soon!