257872670779 has 2 divisors, whose sum is σ = 257872670780. Its totient is φ = 257872670778.

The previous prime is 257872670753. The next prime is 257872670849. The reversal of 257872670779 is 977076278752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 257872670779 - 2⁷ = 257872670651 is a prime.

It is not a weakly prime, because it can be changed into another prime (257878670779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128936335389 + 128936335390.

It is an arithmetic number, because the mean of its divisors is an integer number (128936335390).

Almost surely, 2^257872670779 is an apocalyptic number.

257872670779 is a deficient number, since it is larger than the sum of its proper divisors (1).

257872670779 is an equidigital number, since it uses as much as digits as its factorization.

257872670779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145212480, while the sum is 67.

The spelling of 257872670779 in words is "two hundred fifty-seven billion, eight hundred seventy-two million, six hundred seventy thousand, seven hundred seventy-nine".