991987020984121083

Names of 991987020984121083

• Cardinal: 991987020984121083 can be written as Nine hundred ninety-one quadrillion, nine hundred eighty-seven trillion, twenty billion, nine hundred eighty-four million, one hundred twenty-one thousand and eighty-three.

Scientific notation

• Scientific notation: 9.91987020984121083 × 10¹⁷

Factors of 991987020984121083

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 986

Divisors of 991987020984121083

• Number of divisors d(n): 192
• Complete list of divisors:
  1 3 9 17 27 51 109 153 289 327 459 857 867 981 1853 2571 2601 2943 4913 5559 7713 7803 11881 14569 14739 16677 23139 31501 35643 43707 44217 50031 93413 94503 106929 131121 132651 201977 247673 280239 283509 320787 393363 535517 605931 734449 743019 840717 850527 1588021 1606551 1817793 2203347 2229057 2522151 3433609 4210441 4764063 4819653 5453379 6610041 6687171 10182017 10300827 12485633 12631323 14292189 14458959 19830123 26996357 30546051 30902481 37456899 37893969 42876567 58371353 80054941 80989071 91638153 92707443 112370697 113681907 173094289 175114059 212255761 240164823 242967213 274914459 337112091 458938069 519282867 525342177 629422793 636767283 720494469 728901639 1360933997 1376814207 1557848601 1576026531 1888268379 1910301849 2161483407 2942602913 3608347937 4082801991 4130442621 4673545803 5664805137 5730905547 8725988569 8827808739 10700187481 10825043811 12248405973 12391327863 16994415411 23135877949 26177965707 26483426217 32100562443 32475131433 36745217919 50024249521 68607084437 69407633847 78533897121 79450278651 96301687329 97425394299 148341805673 150072748563 181903187177 205821253311 208222901541 235601691363 288905061987 393309925133 445025417019 450218245689 545709561531 617463759933 624668704623 1166320435429 1179929775399 1335076251057 1350654737067 1637128684593 1852391279799 2521810696441 3092354182009 3498961306287 3539789326197 4005228753171 4911386053779 7478172203633 7565432089323 9277062546027 10496883918861 10619367978591 19827447402293 22434516610899 22696296267969 27831187638081 31490651756583 42870781839497 59482342206879 67303549832697 68088888803907 83493562914243 127128927461761 128612345518491 178447026620637 201910649498091 337066605838981 381386782385283 385837036555473 535341079861911 1011199817516943 1144160347155849 1157511109666419 2161191766849937 3033599452550829 3432481041467547 6483575300549811 9100798357652487 19450725901649433 36740260036448929 58352177704948299 110220780109346787 330662340328040361 991987020984121083
• Sum of all divisors σ(n): 1577739942258480000
• Sum of proper divisors (its aliquot sum) s(n): 585752921274358917
• 991987020984121083 is a deficient number, because the sum of its proper divisors (585752921274358917) is less than itself. Its deficiency is 406234099709762166

Bases of 991987020984121083

• Binary: 110111000100001111101111000010010111100011100111011011111011₂
• Hexadecimal: 0xDC43EF0978E76FB
• Base-36: 7JBI1U98260R

Squares and roots of 991987020984121083

• 991987020984121083 squared (991987020984121083²) is 984038249800951081857179626005092889
• 991987020984121083 cubed (991987020984121083³) is 976153171954473844964816195912815864651967757438278787
• The square root of 991987020984121083 is 995985452.1950213119
• The cube root of 991987020984121083 is 997321.8408613999

Scales and comparisons

• 991,987,020,984,121,083 seconds is equal to 31,542,118,849 years, 50 weeks, 4 days, 6 hours, 58 minutes, 3 seconds.
• To count from 1 to 991,987,020,984,121,083 would take you about ninety-four billion, six hundred twenty-six million, three hundred fifty-six thousand, five hundred forty-nine 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 991987020984121083 cubic inches would be around 83110.2 feet tall.

Recreational maths with 991987020984121083

• 991987020984121083 backwards is 380121489020789199
• The number of decimal digits it has is: 18
• The sum of 991987020984121083's digits is 81
• More coming soon!