256243908708 has 36 divisors (see below), whose sum is σ = 670063097340. Its totient is φ = 82469303616.

The previous prime is 256243908691. The next prime is 256243908719. The reversal of 256243908708 is 807809342652.

256243908708 is a `hidden beast` number, since 2 + 5 + 624 + 3 + 9 + 0 + 8 + 7 + 0 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 182002917924 + 74240990784 = 426618^2 + 272472^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 122721135 + ... + 122723222.

It is an arithmetic number, because the mean of its divisors is an integer number (18612863815).

Almost surely, 2^256243908708 is an apocalyptic number.

It is an amenable number.

256243908708 is an abundant number, since it is smaller than the sum of its proper divisors (413819188632).

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

256243908708 is a wasteful number, since it uses less digits than its factorization.

256243908708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245444396 (or 245444391 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 54.

The spelling of 256243908708 in words is "two hundred fifty-six billion, two hundred forty-three million, nine hundred eight thousand, seven hundred eight".