256748750779 has 2 divisors, whose sum is σ = 256748750780. Its totient is φ = 256748750778.

The previous prime is 256748750761. The next prime is 256748750821. The reversal of 256748750779 is 977057847652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256748750779 - 2¹⁷ = 256748619707 is a prime.

It is not a weakly prime, because it can be changed into another prime (256748750759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128374375389 + 128374375390.

It is an arithmetic number, because the mean of its divisors is an integer number (128374375390).

Almost surely, 2^256748750779 is an apocalyptic number.

256748750779 is a deficient number, since it is larger than the sum of its proper divisors (1).

256748750779 is an equidigital number, since it uses as much as digits as its factorization.

256748750779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 207446400, while the sum is 67.

The spelling of 256748750779 in words is "two hundred fifty-six billion, seven hundred forty-eight million, seven hundred fifty thousand, seven hundred seventy-nine".