1991988806051538

Names of 1991988806051538

• Cardinal: 1991988806051538 can be written as One quadrillion, nine hundred ninety-one trillion, nine hundred eighty-eight billion, eight hundred six million, fifty-one thousand, five hundred thirty-eight.

Scientific notation

• Scientific notation: 1.991988806051538 × 10¹⁵

Factors of 1991988806051538

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 14
• Sum of prime factors: 624

Divisors of 1991988806051538

• Number of divisors d(n): 432
• Complete list of divisors:
  1 2 3 6 7 9 14 18 21 27 42 43 49 54 63 81 86 98 126 129 147 162 189 243 258 294 301 378 387 441 486 567 569 602 774 882 903 1134 1138 1161 1323 1701 1707 1806 1849 2107 2322 2646 2709 3402 3414 3483 3698 3969 3983 4214 5121 5418 5547 6321 6966 7938 7966 8127 10242 10449 11094 11907 11949 12642 12943 15363 16254 16641 18963 20898 23814 23898 24381 24467 25886 27881 30726 33282 35847 37926 38829 46089 48762 48934 49923 55762 56889 71694 73143 73401 77658 79507 83643 90601 92178 99846 107541 113778 116487 138267 146286 146802 149769 159014 167286 170667 171269 181202 215082 220203 232974 238521 250929 271803 276534 299538 322623 341334 342538 349461 440406 449307 477042 501858 512001 513807 543606 556549 645246 660609 698922 715563 752787 815409 898614 967869 1024002 1027614 1048383 1052081 1113098 1198883 1321218 1431126 1505574 1541421 1630818 1669647 1935738 1981827 2096766 2104162 2146689 2258361 2397766 2446227 3082842 3145149 3156243 3339294 3418801 3596649 3895843 3963654 4293378 4516722 4624263 4892454 5008941 5945481 6290298 6312486 6440067 6775083 6837602 7193298 7338681 7364567 7791686 9248526 9468729 10017882 10256403 10789947 11687529 11890962 12880134 13550166 13872789 14677362 14729134 15026823 18937458 19320201 20512806 21579894 22016043 22093701 23375058 23931607 27745578 28406187 30053646 30769209 32369841 35062587 38640402 41618367 44032086 44187402 45080469 45239483 47863214 51551969 56812374 61538418 64739682 66281103 70125174 71794821 83236734 85218561 90160938 90478966 92307627 97109523 103103938 105187761 132562206 135241407 135718449 143589642 147008443 154655907 167521249 170437122 184615254 194219046 198843309 210375522 215384463 255655683 270482814 271436898 276922881 291328569 294016886 309311814 315563283 316676381 335042498 397686618 407155347 430768926 441025329 463967721 502563747 511311366 553845762 582657138 596529927 631126566 633352762 646153389 814310694 830768643 882050658 927935442 946689849 950029143 1005127494 1029059101 1193059854 1221466041 1292306778 1323075987 1391903163 1507691241 1661537286 1789589781 1893379698 1900058286 1938460167 1945297769 2058118202 2216734667 2442932082 2646151974 2783806326 2850087429 3015382482 3087177303 3579179562 3664398123 3876920334 3890595538 3969227961 4175709489 4433469334 4523073723 5700174858 5815380501 5835893307 6174354606 6650204001 7203413707 7328796246 7938455922 8351418978 8550262287 9046147446 9261531909 10993194369 11630761002 11671786614 11907683883 12527128467 13300408002 13569221169 13617084383 14406827414 17100524574 17507679921 18523063818 19950612003 21610241121 21986388738 23815367766 25054256934 25650786861 27138442338 27234168766 27784595727 35015359842 35723051649 39901224006 40707663507 40851253149 43220482242 51301573722 52523039763 55569191454 59851836009 64830723363 71446103298 76952360583 81415327014 81702506298 83353787181 83647804067 95319590681 105046079526 119703672018 122553759447 129661446726 153904721166 157569119289 166707574362 167295608134 179555508027 190639181362 194492170089 245107518894 250061361543 250943412201 285958772043 315138238578 359111016054 367661278341 388984340178 472707357867 500122723086 501886824402 538666524081 571917544086 583476510267 585534628469 735322556682 752830236603 857876316129 945414715734 1077333048162 1102983835023 1166953020534 1171069256938 1505660473206 1715752632258 1750429530801 1756603885407 2205967670046 2258490709809 2573628948387 3308951505069 3500859061602 3513207770814 4098742399283 4516981419618 5147257896774 5269811656221 6617903010138 6775472129427 7720886845161 8197484798566 10539623312442 12296227197849 13550944258854 15441773690322 15809434968663 20326416388281 23162660535483 24592454395698 31618869937326 36888681593547 40652832776562 46325321070966 47428304905989 73777363187094 94856609811978 110666044780641 142284914717967 221332089561282 284569829435934 331998134341923 663996268683846 995994403025769 1991988806051538
• Sum of all divisors σ(n): 5339908221167520
• Sum of proper divisors (its aliquot sum) s(n): 3347919415115982
• 1991988806051538 is an abundant number, because the sum of its proper divisors (3347919415115982) is greater than itself. Its abundance is 1355930609064444

Bases of 1991988806051538

• Binary: 111000100111011010000001001001011100110011011010010₂
• Hexadecimal: 0x713B4092E66D2
• Base-36: JM3N0VHV4I

Squares and roots of 1991988806051538

• 1991988806051538 squared (1991988806051538²) is 3968019403434631874169912165444
• 1991988806051538 cubed (1991988806051538³) is 7904250233837088430091479633098636953046652872
• The square root of 1991988806051538 is 44631701.8054604097
• The cube root of 1991988806051538 is 125823.6553435771

Scales and comparisons

• 1,991,988,806,051,538 seconds is equal to 63,339,082 years, 21 weeks, 23 hours, 12 minutes, 18 seconds.
• To count from 1 to 1,991,988,806,051,538 would take you about one hundred ninety million, seventeen thousand, two hundred forty-seven 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 1991988806051538 cubic inches would be around 10485.3 feet tall.

Recreational maths with 1991988806051538

• 1991988806051538 backwards is 8351506088891991
• 1991988806051538 is a Harshad number.
• The number of decimal digits it has is: 16
• The sum of 1991988806051538's digits is 81
• More coming soon!