| Base | Representation |
|---|---|
| bin | 101111111111011010… |
| … | …001100101001000000 |
| 3 | 11221000012012212121000 |
| 4 | 233333122030221000 |
| 5 | 1321013100312411 |
| 6 | 35401124132000 |
| 7 | 3502645130160 |
| oct | 577732145100 |
| 9 | 157005185530 |
| 10 | 51529697856 |
| 11 | 1a94319775a |
| 12 | 9ba1237000 |
| 13 | 4b2295c5a0 |
| 14 | 26cb9645a0 |
| 15 | 1518d08956 |
| hex | bff68ca40 |
51529697856 has 672 divisors, whose sum is σ = 191863553280. Its totient is φ = 13204021248.
The previous prime is 51529697819. The next prime is 51529697873. The reversal of 51529697856 is 65879692515.
51529697856 is a `hidden beast` number, since 51 + 529 + 6 + 9 + 7 + 8 + 56 = 666.
It is a tau number, because it is divible by the number of its divisors (672).
It is a super-2 number, since 2×515296978562 (a number of 22 digits) contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (63).
It is a junction number, because it is equal to n+sod(n) for n = 51529697793 and 51529697802.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (19) of ones.
It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 705886236 + ... + 705886308.
It is an arithmetic number, because the mean of its divisors is an integer number (285511240).
Almost surely, 251529697856 is an apocalyptic number.
51529697856 is a gapful number since it is divisible by the number (56) 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 51529697856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95931776640).
51529697856 is an abundant number, since it is smaller than the sum of its proper divisors (140333855424).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
51529697856 is a wasteful number, since it uses less digits than its factorization.
51529697856 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 248 (or 165 counting only the distinct ones).
The product of its digits is 40824000, while the sum is 63.
The spelling of 51529697856 in words is "fifty-one billion, five hundred twenty-nine million, six hundred ninety-seven thousand, eight hundred fifty-six".
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