256516015546 has 16 divisors (see below), whose sum is σ = 439863202944. Its totient is φ = 109905069744.

The previous prime is 256516015531. The next prime is 256516015597. The reversal of 256516015546 is 645510615652.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 256516015496 and 256516015505.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2477925 + ... + 2579368.

It is an arithmetic number, because the mean of its divisors is an integer number (27491450184).

Almost surely, 2^256516015546 is an apocalyptic number.

256516015546 is a deficient number, since it is larger than the sum of its proper divisors (183347187398).

256516015546 is a wasteful number, since it uses less digits than its factorization.

256516015546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5060925.

The product of its (nonzero) digits is 1080000, while the sum is 46.

The spelling of 256516015546 in words is "two hundred fifty-six billion, five hundred sixteen million, fifteen thousand, five hundred forty-six".