256613677275427 has 2 divisors, whose sum is σ = 256613677275428. Its totient is φ = 256613677275426.

The previous prime is 256613677275421. The next prime is 256613677275467. The reversal of 256613677275427 is 724572776316652.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256613677275427 - 2²⁷ = 256613543057699 is a prime.

It is not a weakly prime, because it can be changed into another prime (256613677275421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128306838637713 + 128306838637714.

It is an arithmetic number, because the mean of its divisors is an integer number (128306838637714).

Almost surely, 2^{256613677275427} is an apocalyptic number.

256613677275427 is a deficient number, since it is larger than the sum of its proper divisors (1).

256613677275427 is an equidigital number, since it uses as much as digits as its factorization.

256613677275427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1244678400, while the sum is 70.

The spelling of 256613677275427 in words is "two hundred fifty-six trillion, six hundred thirteen billion, six hundred seventy-seven million, two hundred seventy-five thousand, four hundred twenty-seven".