1988921621474991

Names of 1988921621474991

• Cardinal: 1988921621474991 can be written as One quadrillion, nine hundred eighty-eight trillion, nine hundred twenty-one billion, six hundred twenty-one million, four hundred seventy-four thousand, nine hundred ninety-one.

Scientific notation

• Scientific notation: 1.988921621474991 × 10¹⁵

Factors of 1988921621474991

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 169

Divisors of 1988921621474991

• Number of divisors d(n): 360
• Complete list of divisors:
  1 3 7 9 19 21 27 37 49 57 63 103 111 133 147 171 189 259 309 333 361 399 441 513 703 721 777 927 931 999 1083 1197 1323 1813 1957 2109 2163 2331 2527 2781 2793 3249 3591 3811 4921 5047 5439 5871 6327 6489 6993 7581 8379 9747 10609 11433 13357 13699 14763 15141 16317 17613 17689 18981 19467 22743 25137 26677 31827 34299 34447 37183 40071 41097 44289 45423 48951 52839 53067 68229 72409 74263 80031 93499 95481 95893 102897 103341 111549 120213 123291 132867 136269 159201 186739 201571 217227 222789 240093 260281 280497 286443 287679 310023 334647 360639 369873 392533 477603 506863 519841 560217 604713 651681 654493 668367 720279 780843 841491 863037 930069 1003941 1092727 1177599 1375771 1410997 1520589 1559523 1680651 1814139 1821967 1955043 1963479 2005101 2342529 2524473 2589111 2747731 3278181 3532797 3548041 3829849 4127313 4232991 4561767 4678569 5041953 5442417 5465901 5890437 7027587 7458127 7649089 8243193 9630397 9834543 9876979 10598391 10644123 11489547 12381939 12698973 13685301 14035707 16397703 17671311 19234117 20761813 22374381 22947267 24729579 26808943 28891191 29503629 29630937 31932369 34468641 37145817 38096919 40430899 49193109 52206889 53543623 57702351 62285439 67123143 67412779 68841801 74188737 80426829 86673573 88892811 95797107 103405923 112550881 121292697 141704413 145332691 156620667 160630869 173107053 186856317 187662601 201369429 202238337 206525403 241280487 260020719 266678433 283016293 337652643 363878091 365448223 394474447 425113239 435998073 469862001 481892607 519321159 560568951 562987803 606715011 723841461 768187081 787856167 849048879 991930891 1012957929 1017328837 1091634273 1096344669 1183423341 1275339717 1307994219 1409586003 1445677821 1688963409 1820145033 1981114051 2138466739 2304561243 2363568501 2547146637 2761321129 2975792673 3038873787 3051986511 3289034007 3550270023 3826019151 3923982657 4164382597 5066890227 5377309567 5514993169 5943342153 6415400217 6913683729 6943516237 7090705503 7641439911 8283963387 8927378019 9155959533 9867102021 10650810069 12493147791 14595554539 14969267173 16131928701 16544979507 17830026459 19246200651 19329247903 20741051187 20830548711 21272116509 24851890161 26782134057 27467878599 29150678179 37479443373 37641166969 40630868041 43786663617 44907801519 48395786103 49634938521 53490079377 57738601953 57987743709 62491646133 74555670483 79123269343 87452034537 102168881773 104784870211 112438330119 112923500907 121892604123 131359990851 134723404557 145187358309 148904815563 173963231127 187474938399 204054747253 237369808029 262356103611 284416076287 306506645319 314354610633 338770502721 365677812369 394079972553 404170213671 521889693381 553862885401 612164241759 712109424087 715182172411 787068310833 853248228861 919519935957 943063831899 1016311508163 1097033437107 1503342117517 1661588656203 1836492725277 1990912534009 2136328272261 2145546517233 2559744686583 2758559807871 2829191495697 3877040197807 4510026352551 4984765968609 5509478175831 5972737602027 6436639551699 7679234059749 10523394822619 11631120593421 13530079057653 14954297905827 17918212806081 19309918655097 31570184467857 34893361780263 40590237172959 53754638418243 73663763758333 94710553403571 104680085340789 220991291274999 284131660210713 662973873824997 1988921621474991
• Sum of all divisors σ(n): 3751710951518640
• Sum of proper divisors (its aliquot sum) s(n): 1762789330043649
• 1988921621474991 is a deficient number, because the sum of its proper divisors (1762789330043649) is less than itself. Its deficiency is 226132291431342

Bases of 1988921621474991

• Binary: 111000100001110100111100110101110111110111010101111₂
• Hexadecimal: 0x710E9E6BBEEAF
• Base-36: JL0HZ8ZP9R

Squares and roots of 1988921621474991

• 1988921621474991 squared (1988921621474991²) is 3955809216370707380586438450081
• 1988921621474991 cubed (1988921621474991³) is 7867794480869740835805781762163963087143424271
• The square root of 1988921621474991 is 44597327.5149418679
• The cube root of 1988921621474991 is 125759.0427613447

Scales and comparisons

• 1,988,921,621,474,991 seconds is equal to 63,241,555 years, 22 weeks, 11 hours, 29 minutes, 51 seconds.
• To count from 1 to 1,988,921,621,474,991 would take you about one hundred eighty-nine million, seven hundred twenty-four thousand, six hundred sixty-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 1988921621474991 cubic inches would be around 10479.9 feet tall.

Recreational maths with 1988921621474991

• 1988921621474991 backwards is 1994741261298891
• The number of decimal digits it has is: 16
• The sum of 1988921621474991's digits is 81
• More coming soon!