256717882711 has 2 divisors, whose sum is σ = 256717882712. Its totient is φ = 256717882710.

The previous prime is 256717882639. The next prime is 256717882753. The reversal of 256717882711 is 117288717652.

256717882711 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256717882711 - 2²⁹ = 256181011799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256717882111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128358941355 + 128358941356.

It is an arithmetic number, because the mean of its divisors is an integer number (128358941356).

Almost surely, 2^256717882711 is an apocalyptic number.

256717882711 is a deficient number, since it is larger than the sum of its proper divisors (1).

256717882711 is an equidigital number, since it uses as much as digits as its factorization.

256717882711 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2634240, while the sum is 55.

The spelling of 256717882711 in words is "two hundred fifty-six billion, seven hundred seventeen million, eight hundred eighty-two thousand, seven hundred eleven".