256631677045147 has 2 divisors, whose sum is σ = 256631677045148. Its totient is φ = 256631677045146.

The previous prime is 256631677045109. The next prime is 256631677045151. The reversal of 256631677045147 is 741540776136652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256631677045147 - 2³⁵ = 256597317306779 is a prime.

It is not a weakly prime, because it can be changed into another prime (256631677045157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128315838522573 + 128315838522574.

It is an arithmetic number, because the mean of its divisors is an integer number (128315838522574).

Almost surely, 2^{256631677045147} is an apocalyptic number.

256631677045147 is a deficient number, since it is larger than the sum of its proper divisors (1).

256631677045147 is an equidigital number, since it uses as much as digits as its factorization.

256631677045147 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 177811200, while the sum is 64.

The spelling of 256631677045147 in words is "two hundred fifty-six trillion, six hundred thirty-one billion, six hundred seventy-seven million, forty-five thousand, one hundred forty-seven".