256220441154 has 48 divisors (see below), whose sum is σ = 575533478520. Its totient is φ = 82282798080.

The previous prime is 256220441149. The next prime is 256220441177. The reversal of 256220441154 is 451144022652.

256220441154 is a `hidden beast` number, since 2 + 5 + 62 + 2 + 0 + 441 + 154 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 235202690529 + 21017750625 = 484977^2 + 144975^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 291727 + ... + 773010.

Almost surely, 2^256220441154 is an apocalyptic number.

256220441154 is an abundant number, since it is smaller than the sum of its proper divisors (319313037366).

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

256220441154 is a wasteful number, since it uses less digits than its factorization.

256220441154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1065235 (or 1065232 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 36.

The spelling of 256220441154 in words is "two hundred fifty-six billion, two hundred twenty million, four hundred forty-one thousand, one hundred fifty-four".