821428904481901911

Names of 821428904481901911

• Cardinal: 821428904481901911 can be written as Eight hundred twenty-one quadrillion, four hundred twenty-eight trillion, nine hundred four billion, four hundred eighty-one million, nine hundred one thousand, nine hundred eleven.

Scientific notation

• Scientific notation: 8.21428904481901911 × 10¹⁷

Factors of 821428904481901911

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 17628469

Divisors of 821428904481901911

• Number of divisors d(n): 48
• Complete list of divisors:
  1 3 9 13 39 117 4817 14451 43353 62621 83093 187863 249279 563589 747837 1080209 3240627 9721881 17540543 52621629 157864887 228027059 400258981 684081177 1200776943 2052243531 3602330829 5203366753 15610100259 46830300777 84492795631 253478386893 760435160679 1098406343203 1457496339499 3295219029609 4372489018497 9885657088827 13117467055491 18947452413487 56842357240461 170527071721383 7020759867366683 21062279602100049 63186838806300147 91269878275766879 273809634827300637 821428904481901911
• Sum of all divisors σ(n): 1278059013938843136
• Sum of proper divisors (its aliquot sum) s(n): 456630109456941225
• 821428904481901911 is a deficient number, because the sum of its proper divisors (456630109456941225) is less than itself. Its deficiency is 364798795024960686

Bases of 821428904481901911

• Binary: 101101100110010011010011110010001011111000011100110101010111₂
• Hexadecimal: 0xB664D3C8BE1CD57
• Base-36: 68O48T7QPHZR

Squares and roots of 821428904481901911

• 821428904481901911 squared (821428904481901911²) is 674745445118337533408700539825451921
• 821428904481901911 cubed (821428904481901911³) is 554255411787709269811044746985708456940341471168521031
• The square root of 821428904481901911 is 906327150.9129040271
• The cube root of 821428904481901911 is 936533.5218382945

Scales and comparisons

• 821,428,904,481,901,911 seconds is equal to 26,118,898,316 years, 5 weeks, 1 hour, 11 minutes, 51 seconds.
• To count from 1 to 821,428,904,481,901,911 would take you about seventy-eight billion, three hundred fifty-six million, six hundred ninety-four thousand, nine hundred forty-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 821428904481901911 cubic inches would be around 78044.5 feet tall.

Recreational maths with 821428904481901911

• 821428904481901911 backwards is 119109184409824128
• The number of decimal digits it has is: 18
• The sum of 821428904481901911's digits is 72
• More coming soon!