256631105045755 has 32 divisors (see below), whose sum is σ = 338610681815040. Its totient is φ = 185164665477120.

The previous prime is 256631105045723. The next prime is 256631105045827. The reversal of 256631105045755 is 557540501136652.

It is not a de Polignac number, because 256631105045755 - 2⁵ = 256631105045723 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a junction number, because it is equal to n+sod(n) for n = 256631105045696 and 256631105045705.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 202120731 + ... + 203386459.

It is an arithmetic number, because the mean of its divisors is an integer number (10581583806720).

Almost surely, 2^{256631105045755} is an apocalyptic number.

256631105045755 is a deficient number, since it is larger than the sum of its proper divisors (81979576769285).

256631105045755 is a wasteful number, since it uses less digits than its factorization.

256631105045755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1294899.

The product of its (nonzero) digits is 18900000, while the sum is 55.

The spelling of 256631105045755 in words is "two hundred fifty-six trillion, six hundred thirty-one billion, one hundred five million, forty-five thousand, seven hundred fifty-five".