257567298427 has 2 divisors, whose sum is σ = 257567298428. Its totient is φ = 257567298426.

The previous prime is 257567298407. The next prime is 257567298451. The reversal of 257567298427 is 724892765752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 257567298427 - 2¹¹ = 257567296379 is a prime.

It is not a weakly prime, because it can be changed into another prime (257567298407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128783649213 + 128783649214.

It is an arithmetic number, because the mean of its divisors is an integer number (128783649214).

Almost surely, 2^257567298427 is an apocalyptic number.

257567298427 is a deficient number, since it is larger than the sum of its proper divisors (1).

257567298427 is an equidigital number, since it uses as much as digits as its factorization.

257567298427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 118540800, while the sum is 64.

The spelling of 257567298427 in words is "two hundred fifty-seven billion, five hundred sixty-seven million, two hundred ninety-eight thousand, four hundred twenty-seven".