256631260567252 has 48 divisors (see below), whose sum is σ = 500755538888640. Its totient is φ = 114364510751232.

The previous prime is 256631260567193. The next prime is 256631260567277. The reversal of 256631260567252 is 252765062136652.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37604578 + ... + 43901785.

It is an arithmetic number, because the mean of its divisors is an integer number (10432407060180).

Almost surely, 2^{256631260567252} is an apocalyptic number.

It is an amenable number.

256631260567252 is a deficient number, since it is larger than the sum of its proper divisors (244124278321388).

256631260567252 is a wasteful number, since it uses less digits than its factorization.

256631260567252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81508840 (or 81508838 counting only the distinct ones).

The product of its (nonzero) digits is 54432000, while the sum is 58.

The spelling of 256631260567252 in words is "two hundred fifty-six trillion, six hundred thirty-one billion, two hundred sixty million, five hundred sixty-seven thousand, two hundred fifty-two".