256885593841 has 16 divisors (see below), whose sum is σ = 262548708480. Its totient is φ = 251253733120.

The previous prime is 256885593791. The next prime is 256885593857. The reversal of 256885593841 is 148395588652.

It is a cyclic number.

It is not a de Polignac number, because 256885593841 - 2¹⁵ = 256885561073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256885593871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31950900 + ... + 31958938.

It is an arithmetic number, because the mean of its divisors is an integer number (16409294280).

Almost surely, 2^256885593841 is an apocalyptic number.

It is an amenable number.

256885593841 is a deficient number, since it is larger than the sum of its proper divisors (5663114639).

256885593841 is a wasteful number, since it uses less digits than its factorization.

256885593841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9896.

The product of its digits is 82944000, while the sum is 64.

The spelling of 256885593841 in words is "two hundred fifty-six billion, eight hundred eighty-five million, five hundred ninety-three thousand, eight hundred forty-one".