256255804870 has 32 divisors (see below), whose sum is σ = 497209591872. Its totient is φ = 94528467072.

The previous prime is 256255804867. The next prime is 256255804957. The reversal of 256255804870 is 78408552652.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

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, 788997 + ... + 1065376.

It is an arithmetic number, because the mean of its divisors is an integer number (15537799746).

Almost surely, 2^256255804870 is an apocalyptic number.

256255804870 is a deficient number, since it is larger than the sum of its proper divisors (240953787002).

256255804870 is a wasteful number, since it uses less digits than its factorization.

256255804870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1855456.

The product of its (nonzero) digits is 5376000, while the sum is 52.

The spelling of 256255804870 in words is "two hundred fifty-six billion, two hundred fifty-five million, eight hundred four thousand, eight hundred seventy".