256325640154 has 32 divisors (see below), whose sum is σ = 406181381760. Its totient is φ = 120981196800.

The previous prime is 256325640139. The next prime is 256325640163. The reversal of 256325640154 is 451046523652.

It is a self number, because there is not a number n which added to its sum of digits gives 256325640154.

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, 12241614 + ... + 12262534.

It is an arithmetic number, because the mean of its divisors is an integer number (12693168180).

Almost surely, 2^256325640154 is an apocalyptic number.

256325640154 is a deficient number, since it is larger than the sum of its proper divisors (149855741606).

256325640154 is a wasteful number, since it uses less digits than its factorization.

256325640154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22086.

The product of its (nonzero) digits is 864000, while the sum is 43.

The spelling of 256325640154 in words is "two hundred fifty-six billion, three hundred twenty-five million, six hundred forty thousand, one hundred fifty-four".