256375563 has 8 divisors (see below), whose sum is σ = 342388800. Its totient is φ = 170639688.

The previous prime is 256375543. The next prime is 256375577. The reversal of 256375563 is 365573652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 256375563 - 2⁸ = 256375307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256375523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67173 + ... + 70886.

It is an arithmetic number, because the mean of its divisors is an integer number (42798600).

Almost surely, 2^256375563 is an apocalyptic number.

256375563 is a deficient number, since it is larger than the sum of its proper divisors (86013237).

256375563 is a wasteful number, since it uses less digits than its factorization.

256375563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138681.

The product of its digits is 567000, while the sum is 42.

The square root of 256375563 is about 16011.7320424744. The cubic root of 256375563 is about 635.2707738099.

The spelling of 256375563 in words is "two hundred fifty-six million, three hundred seventy-five thousand, five hundred sixty-three".