813538781913

Names of 813538781913

• Cardinal: 813538781913 can be written as Eight hundred thirteen billion, five hundred thirty-eight million, seven hundred eighty-one thousand, nine hundred thirteen.

Scientific notation

• Scientific notation: 8.13538781913 × 10¹¹

Factors of 813538781913

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 665

Divisors of 813538781913

• Number of divisors d(n): 192
• Complete list of divisors:
  1 3 11 13 19 33 39 57 71 143 209 213 241 247 307 361 429 627 723 741 781 921 923 1083 1349 2343 2651 2717 2769 3133 3377 3971 3991 4047 4579 4693 5833 7953 8151 9399 10131 10153 11913 11973 13737 14079 14839 17111 17499 17537 21797 25631 30459 34463 43901 44517 50369 51333 51623 52611 59527 64163 65391 73987 75829 76893 87001 103389 110827 131703 151107 154869 178581 188221 192489 192907 221961 222443 227487 239767 261003 281941 283361 325109 332481 333203 414143 564663 578721 654797 667329 719301 813857 834119 845823 850083 957011 961831 975327 999609 1131013 1219097 1242429 1405753 1440751 1964391 2441571 2446873 2502357 2871033 2885493 3116971 3393039 3576199 3657291 3665233 4217259 4226417 4322253 4555573 5253077 5383859 6177071 7340619 7868717 9350913 10580141 10728597 10995699 12441143 12679251 13666719 15463283 15759231 15848261 16151577 18274789 18531213 23606151 26709307 31740423 37323429 46389849 46490587 47544783 54824367 57783847 59222449 67947781 68290001 80127921 80301923 86555887 99808463 102293321 139471761 173351541 177667347 201022679 203843343 204870003 240905769 259667661 293802377 299425389 306879963 347220991 603068037 751190011 881407131 883321153 1041662973 1097893093 1125226531 1297510019 1896360797 2253570033 2649963459 3293679279 3375679593 3819430901 3892530057 5689082391 11458292703 14272610209 20859968767 24652690361 42817830627 62579906301 73958071083 271179593971 813538781913
• Sum of all divisors σ(n): 1374019282944
• Sum of proper divisors (its aliquot sum) s(n): 560480501031
• 813538781913 is a deficient number, because the sum of its proper divisors (560480501031) is less than itself. Its deficiency is 253058280882

Bases of 813538781913

• Binary: 1011110101101010101100001010101011011001₂
• Hexadecimal: 0xBD6AB0AAD9
• Base-36: ADQFZHLL

Squares and roots of 813538781913

• 813538781913 squared (813538781913²) is 661845349676487775939569
• 813538781913 cubed (813538781913³) is 538436859590593413853911433358215497
• The square root of 813538781913 is 901963.8473425639
• The cube root of 813538781913 is 9335.2528806485

Scales and comparisons

• 813,538,781,913 seconds is equal to 25,868 years, 6 days, 2 hours, 58 minutes, 33 seconds.
• To count from 1 to 813,538,781,913 would take you about fifty-one thousand, seven hundred thirty-six 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 813538781913 cubic inches would be around 777.9 feet tall.

Recreational maths with 813538781913

• 813538781913 backwards is 319187835318
• 813538781913 is a Harshad number.
• The number of decimal digits it has is: 12
• The sum of 813538781913's digits is 57
• More coming soon!