| Base | Representation |
|---|---|
| bin | 1001001010111011001011111… |
| … | …1000100100100001001011000 |
| 3 | 10010121221000011022000012000000 |
| 4 | 2102232302333010210021120 |
| 5 | 1134041044113220202410 |
| 6 | 10204300444412213000 |
| 7 | 252633412435126140 |
| oct | 22256627704441130 |
| 9 | 3117830138005000 |
| 10 | 645330631803480 |
| 11 | 177693202a11137 |
| 12 | 60465496a6a160 |
| 13 | 21911557211a3c |
| 14 | b550252541920 |
| 15 | 4e917e60e4dc0 |
| hex | 24aecbf124258 |
645330631803480 has 1792 divisors, whose sum is σ = 2656216644480000. Its totient is φ = 138143968376832.
The previous prime is 645330631803437. The next prime is 645330631803491. The reversal of 645330631803480 is 84308136033546.
645330631803480 is a `hidden beast` number, since 6 + 4 + 53 + 3 + 0 + 6 + 31 + 80 + 3 + 480 = 666.
It is a super-2 number, since 2×6453306318034802 (a number of 30 digits) contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (54).
It is a congruent number.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (23) of ones.
It is a polite number, since it can be written in 447 ways as a sum of consecutive naturals, for example, 124605255531 + ... + 124605260709.
It is an arithmetic number, because the mean of its divisors is an integer number (1482263752500).
Almost surely, 2645330631803480 is an apocalyptic number.
645330631803480 is a gapful number since it is divisible by the number (60) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 645330631803480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1328108322240000).
645330631803480 is an abundant number, since it is smaller than the sum of its proper divisors (2010886012676520).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
645330631803480 is an equidigital number, since it uses as much as digits as its factorization.
645330631803480 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 5361 (or 5304 counting only the distinct ones).
The product of its (nonzero) digits is 14929920, while the sum is 54.
The spelling of 645330631803480 in words is "six hundred forty-five trillion, three hundred thirty billion, six hundred thirty-one million, eight hundred three thousand, four hundred eighty".
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