256245030555 has 32 divisors (see below), whose sum is σ = 429193589760. Its totient is φ = 130301719680.

The previous prime is 256245030533. The next prime is 256245030563. The reversal of 256245030555 is 555030542652.

It is not a de Polignac number, because 256245030555 - 2⁷ = 256245030427 is a prime.

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 31 ways as a sum of consecutive naturals, for example, 1086820 + ... + 1301409.

It is an arithmetic number, because the mean of its divisors is an integer number (13412299680).

Almost surely, 2^256245030555 is an apocalyptic number.

256245030555 is a deficient number, since it is larger than the sum of its proper divisors (172948559205).

256245030555 is a wasteful number, since it uses less digits than its factorization.

256245030555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2388571.

The product of its (nonzero) digits is 900000, while the sum is 42.

The spelling of 256245030555 in words is "two hundred fifty-six billion, two hundred forty-five million, thirty thousand, five hundred fifty-five".