256216865874 has 16 divisors (see below), whose sum is σ = 512822249280. Its totient is φ = 85340869040.

The previous prime is 256216865873. The next prime is 256216865887. The reversal of 256216865874 is 478568612652.

It is not an unprimeable number, because it can be changed into a prime (256216865873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16179657 + ... + 16195484.

It is an arithmetic number, because the mean of its divisors is an integer number (32051390580).

Almost surely, 2^256216865874 is an apocalyptic number.

256216865874 is an abundant number, since it is smaller than the sum of its proper divisors (256605383406).

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

256216865874 is a wasteful number, since it uses less digits than its factorization.

256216865874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32376465.

The product of its digits is 38707200, while the sum is 60.

The spelling of 256216865874 in words is "two hundred fifty-six billion, two hundred sixteen million, eight hundred sixty-five thousand, eight hundred seventy-four".