257384655413 has 2 divisors, whose sum is σ = 257384655414. Its totient is φ = 257384655412.

The previous prime is 257384655403. The next prime is 257384655487. The reversal of 257384655413 is 314556483752.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 254195455684 + 3189199729 = 504178^2 + 56473^2 .

It is a cyclic number.

It is not a de Polignac number, because 257384655413 - 2⁶ = 257384655349 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257384655403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128692327706 + 128692327707.

It is an arithmetic number, because the mean of its divisors is an integer number (128692327707).

Almost surely, 2^257384655413 is an apocalyptic number.

It is an amenable number.

257384655413 is a deficient number, since it is larger than the sum of its proper divisors (1).

257384655413 is an equidigital number, since it uses as much as digits as its factorization.

257384655413 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096000, while the sum is 53.

The spelling of 257384655413 in words is "two hundred fifty-seven billion, three hundred eighty-four million, six hundred fifty-five thousand, four hundred thirteen".