256657306416 has 80 divisors (see below), whose sum is σ = 758667227904. Its totient is φ = 73241908992.

The previous prime is 256657306393. The next prime is 256657306417. The reversal of 256657306416 is 614603756652.

It is not an unprimeable number, because it can be changed into a prime (256657306417) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 183955 + ... + 739698.

Almost surely, 2^256657306416 is an apocalyptic number.

It is an amenable number.

256657306416 is an abundant number, since it is smaller than the sum of its proper divisors (502009921488).

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

256657306416 is a wasteful number, since it uses less digits than its factorization.

256657306416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 924498 (or 924492 counting only the distinct ones).

The product of its (nonzero) digits is 5443200, while the sum is 51.

The spelling of 256657306416 in words is "two hundred fifty-six billion, six hundred fifty-seven million, three hundred six thousand, four hundred sixteen".