256632436404 has 60 divisors (see below), whose sum is σ = 676825039044. Its totient is φ = 84787105536.

The previous prime is 256632436331. The next prime is 256632436427. The reversal of 256632436404 is 404634236652.

256632436404 is a `hidden beast` number, since 2 + 5 + 6 + 632 + 4 + 3 + 6 + 4 + 0 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 109098090000 + 147534346404 = 330300^2 + 384102^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 256632436404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3468147 + ... + 3541370.

Almost surely, 2^256632436404 is an apocalyptic number.

It is an amenable number.

256632436404 is an abundant number, since it is smaller than the sum of its proper divisors (420192602640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256632436404 is a wasteful number, since it uses less digits than its factorization.

256632436404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7009646 (or 7009635 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 45.

The spelling of 256632436404 in words is "two hundred fifty-six billion, six hundred thirty-two million, four hundred thirty-six thousand, four hundred four".