991990427805

Names of 991990427805

• Cardinal: 991990427805 can be written as Nine hundred ninety-one billion, nine hundred ninety million, four hundred twenty-seven thousand, eight hundred five.

Scientific notation

• Scientific notation: 9.91990427805 × 10¹¹

Factors of 991990427805

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 17
• Sum of prime factors: 68

Divisors of 991990427805

• Number of divisors d(n): 234
• Complete list of divisors:
  1 3 5 9 13 15 27 39 45 47 65 81 117 135 141 169 195 235 243 351 405 423 507 585 611 705 729 845 1053 1215 1269 1521 1755 1833 2115 2187 2209 2535 3055 3159 3645 3807 4563 5265 5499 6345 6561 6627 7605 7943 9165 9477 10935 11045 11421 13689 15795 16497 19035 19683 19881 22815 23829 27495 28431 28717 32805 33135 34263 39715 41067 47385 49491 57105 59049 59643 68445 71487 82485 85293 86151 98415 99405 102789 119145 123201 142155 143585 148473 171315 177147 178929 205335 214461 247455 255879 258453 295245 298215 308367 357435 369603 373321 426465 430755 445419 513945 531441 536787 616005 643383 742365 767637 775359 885735 894645 925101 1072305 1108809 1119963 1279395 1292265 1336257 1541835 1610361 1848015 1866605 1930149 2227095 2302911 2326077 2657205 2683935 2775303 3216915 3326427 3359889 3838185 3876795 4008771 4625505 4831083 5544045 5599815 5790447 6681285 6908733 6978231 8051805 8325909 9650745 9979281 10079667 11514555 11630385 12026313 13876515 14493249 16632135 16799445 17371341 20043855 20934693 24155415 24977727 28952235 29937843 30239001 34543665 34891155 36078939 41629545 43479747 49896405 50398335 52114023 60131565 62804079 72466245 86856705 89813529 90717003 104673465 108236817 124888635 130439241 149689215 151195005 156342069 180394695 188412237 217398735 260570115 272151009 314020395 324710451 391317723 449067645 453585015 469026207 541184085 565236711 652196205 781710345 816453027 942061185 1173953169 1360755045 1407078621 1623552255 1695710133 1956588615 2345131035 2449359081 2826183555 4082265135 4221235863 5087130399 5869765845 7035393105 7348077243 8478550665 12246795405 15261391197 21106179315 22044231729 25435651995 36740386215 66132695187 76306955985 110221158645 198398085561 330663475935 991990427805
• Sum of all divisors σ(n): 1975513229946
• Sum of proper divisors (its aliquot sum) s(n): 983522802141
• 991990427805 is a deficient number, because the sum of its proper divisors (983522802141) is less than itself. Its deficiency is 8467625664

Bases of 991990427805

• Binary: 1110011011110111001111001011000010011101₂
• Hexadecimal: 0xE6F73CB09D
• Base-36: CNPPHKT9

Squares and roots of 991990427805

• 991990427805 squared (991990427805²) is 984045008856746917118025
• 991990427805 cubed (991990427805³) is 976163229315179388272524497426685125
• The square root of 991990427805 is 995987.1624699789
• The cube root of 991990427805 is 9973.2298257427

Scales and comparisons

• 991,990,427,805 seconds is equal to 31,542 years, 11 weeks, 5 days, 16 hours, 36 minutes, 45 seconds.
• To count from 1 to 991,990,427,805 would take you about sixty-three thousand and eighty-four 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 991990427805 cubic inches would be around 831.1 feet tall.

Recreational maths with 991990427805

• 991990427805 backwards is 508724099199
• The number of decimal digits it has is: 12
• The sum of 991990427805's digits is 63
• More coming soon!