256613641356 has 24 divisors (see below), whose sum is σ = 630279119680. Its totient is φ = 81035886672.

The previous prime is 256613641237. The next prime is 256613641373. The reversal of 256613641356 is 653146316652.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 562748986 + ... + 562749441.

Almost surely, 2^256613641356 is an apocalyptic number.

It is an amenable number.

256613641356 is an abundant number, since it is smaller than the sum of its proper divisors (373665478324).

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

256613641356 is a wasteful number, since it uses less digits than its factorization.

256613641356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1125498453 (or 1125498451 counting only the distinct ones).

The product of its digits is 2332800, while the sum is 48.

The spelling of 256613641356 in words is "two hundred fifty-six billion, six hundred thirteen million, six hundred forty-one thousand, three hundred fifty-six".