256131955810 has 32 divisors (see below), whose sum is σ = 468910192320. Its totient is φ = 100703733312.

The previous prime is 256131955801. The next prime is 256131955837. The reversal of 256131955810 is 18559131652.

It is a super-2 number, since 2×256131955810² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5752152 + ... + 5796508.

It is an arithmetic number, because the mean of its divisors is an integer number (14653443510).

Almost surely, 2^256131955810 is an apocalyptic number.

256131955810 is a deficient number, since it is larger than the sum of its proper divisors (212778236510).

256131955810 is a wasteful number, since it uses less digits than its factorization.

256131955810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54210.

The product of its (nonzero) digits is 324000, while the sum is 46.

The spelling of 256131955810 in words is "two hundred fifty-six billion, one hundred thirty-one million, nine hundred fifty-five thousand, eight hundred ten".