256496151518 has 16 divisors (see below), whose sum is σ = 389820982320. Its totient is φ = 126565200000.

The previous prime is 256496151473. The next prime is 256496151647. The reversal of 256496151518 is 815151694652.

It is a self number, because there is not a number n which added to its sum of digits gives 256496151518.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2289083 + ... + 2398518.

It is an arithmetic number, because the mean of its divisors is an integer number (24363811395).

Almost surely, 2^256496151518 is an apocalyptic number.

256496151518 is a deficient number, since it is larger than the sum of its proper divisors (133324830802).

256496151518 is a wasteful number, since it uses less digits than its factorization.

256496151518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4687963.

The product of its digits is 2592000, while the sum is 53.

The spelling of 256496151518 in words is "two hundred fifty-six billion, four hundred ninety-six million, one hundred fifty-one thousand, five hundred eighteen".