81640304109

Names of 81640304109

• Cardinal: 81640304109 can be written as Eighty-one billion, six hundred forty million, three hundred four thousand, one hundred nine.

Scientific notation

• Scientific notation: 8.1640304109 × 10¹⁰

Factors of 81640304109

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 325

Divisors of 81640304109

• Number of divisors d(n): 320
• Complete list of divisors:
  1 3 7 9 13 19 21 27 39 47 57 63 79 81 91 117 133 141 157 171 189 237 247 273 329 351 399 423 471 513 553 567 611 711 741 819 893 987 1027 1053 1099 1197 1269 1413 1501 1539 1659 1729 1833 2041 2133 2223 2457 2679 2961 2983 3081 3297 3591 3713 3807 4239 4277 4503 4977 5187 5499 6123 6251 6399 6669 7189 7371 7379 8037 8883 8949 9243 9891 10507 10773 11139 11609 12403 12717 12831 13509 14287 14931 15561 16497 18369 18753 19513 20007 20881 21567 22137 24111 25991 26649 26847 27729 29673 31521 33417 34827 37209 38493 38779 40527 42861 44793 46683 48269 49491 51653 55107 56259 58539 62643 64701 66411 70547 72333 77973 80541 81263 83187 86821 89019 94563 95927 100251 104481 111627 115479 116337 121581 128583 136591 140049 140201 144807 154959 161239 165321 168777 175617 187929 194103 199233 211641 233919 235657 241623 243789 260463 271453 283689 287781 300753 313443 334881 337883 346437 349011 385749 409773 420603 434421 464877 483717 493829 506331 526851 563787 582309 582941 597699 634923 671489 701757 706971 731367 781389 814359 851067 863343 917111 940329 981407 1004643 1013649 1047033 1128673 1157247 1229319 1261809 1303263 1394631 1451151 1481487 1580553 1649599 1691361 1748823 1822613 1904769 2014467 2105271 2120913 2194101 2344167 2443077 2590029 2751333 2944221 3040947 3063541 3141099 3386019 3687957 3785427 3909789 4080587 4183893 4353453 4444461 4948797 5246469 5467839 5714307 6043401 6362739 6419777 6582303 7032501 7329231 7578233 7770087 8253999 8832663 9122841 9190623 10158057 11063871 11075879 11356281 12241761 12758291 13060359 13333383 14846391 15739407 16403517 18130203 19088217 19259331 21444787 21987693 22734699 24761997 26497989 27368523 27571869 30474171 33227637 36725283 38274873 40000149 44539173 47218221 49210551 53047631 54390609 57777993 64334361 68204097 74285991 77531153 79493967 82715607 91422513 99682911 110175849 114824619 133617519 143986427 147631653 159142893 173333979 193003083 204612291 232593459 248146821 299048733 330527547 344473857 431959281 477428679 520001937 579009249 613836873 697780377 897146199 1007904989 1033421571 1295877843 1432286037 1737027747 2093341131 3023714967 3887633529 4296858111 6280023393 9071144901 11662900587 27213434703 81640304109
• Sum of all divisors σ(n): 164445388800
• Sum of proper divisors (its aliquot sum) s(n): 82805084691
• 81640304109 is an abundant number, because the sum of its proper divisors (82805084691) is greater than itself. Its abundance is 1164780582

Bases of 81640304109

• Binary: 1001100000010001001000010110111101101₂
• Hexadecimal: 0x1302242DED
• Base-36: 11I6J1T9

Squares and roots of 81640304109

• 81640304109 squared (81640304109²) is 6665139255010002283881
• 81640304109 cubed (81640304109³) is 544143995707850288292829388767029
• The square root of 81640304109 is 285727.6747341777
• The cube root of 81640304109 is 4338.1197676453

Scales and comparisons

• 81,640,304,109 seconds is equal to 2,595 years, 47 weeks, 1 day, 22 hours, 15 minutes, 9 seconds.
• To count from 1 to 81,640,304,109 would take you about five thousand, one hundred ninety-one 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 81640304109 cubic inches would be around 361.5 feet tall.

Recreational maths with 81640304109

• 81640304109 backwards is 90140304618
• The number of decimal digits it has is: 11
• The sum of 81640304109's digits is 36
• More coming soon!