256756804458 has 32 divisors (see below), whose sum is σ = 640224760320. Its totient is φ = 66690078960.

The previous prime is 256756804439. The next prime is 256756804487. The reversal of 256756804458 is 854408657652.

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, 277874868 + ... + 277875791.

It is an arithmetic number, because the mean of its divisors is an integer number (20007023760).

Almost surely, 2^256756804458 is an apocalyptic number.

256756804458 is an abundant number, since it is smaller than the sum of its proper divisors (383467955862).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256756804458 is a wasteful number, since it uses less digits than its factorization.

256756804458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555750682.

The product of its (nonzero) digits is 64512000, while the sum is 60.

The spelling of 256756804458 in words is "two hundred fifty-six billion, seven hundred fifty-six million, eight hundred four thousand, four hundred fifty-eight".