155493668421

Names of 155493668421

• Cardinal: 155493668421 can be written as One hundred fifty-five billion, four hundred ninety-three million, six hundred sixty-eight thousand, four hundred twenty-one.

Scientific notation

• Scientific notation: 1.55493668421 × 10¹¹

Factors of 155493668421

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 3704

Divisors of 155493668421

• Number of divisors d(n): 96
• Complete list of divisors:
  1 3 7 9 13 21 39 63 91 117 181 273 331 543 819 993 1267 1629 2317 2353 2979 3169 3801 4303 6951 7059 9507 11403 12909 16471 20853 21177 22183 28521 30121 38727 41197 49413 59911 66549 90363 123591 148239 179733 199647 271089 288379 370773 419377 539199 573589 778843 865137 1048939 1258131 1720767 2336529 2595411 3146817 3774393 4015123 5162301 5451901 7009587 7342573 7456657 9440451 12045369 13636207 16355703 22027719 22369971 36136107 40908621 49067109 52196599 66083157 67109913 95453449 122725863 156589797 189857959 286360347 469769391 569573877 859081041 1329005713 1708721631 2468153467 3987017139 7404460401 11961051417 17277074269 22213381203 51831222807 155493668421
• Sum of all divisors σ(n): 278888180480
• Sum of proper divisors (its aliquot sum) s(n): 123394512059
• 155493668421 is a deficient number, because the sum of its proper divisors (123394512059) is less than itself. Its deficiency is 32099156362

Bases of 155493668421

• Binary: 10010000110100001001010001011001000101₂
• Hexadecimal: 0x2434251645
• Base-36: 1ZFKWYF9

Squares and roots of 155493668421

• 155493668421 squared (155493668421²) is 24178280919019892633241
• 155493668421 cubed (155493668421³) is 3759569596211870337416196616582461
• The square root of 155493668421 is 394326.8548057563
• The cube root of 155493668421 is 5377.3821744603

Scales and comparisons

• 155,493,668,421 seconds is equal to 4,944 years, 11 weeks, 2 days, 5 hours, 40 minutes, 21 seconds.
• To count from 1 to 155,493,668,421 would take you about nine thousand, eight hundred eighty-eight 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 155493668421 cubic inches would be around 448.1 feet tall.

Recreational maths with 155493668421

• 155493668421 backwards is 124866394551
• The number of decimal digits it has is: 12
• The sum of 155493668421's digits is 54
• More coming soon!