257396434027 has 2 divisors, whose sum is σ = 257396434028. Its totient is φ = 257396434026.

The previous prime is 257396433997. The next prime is 257396434109. The reversal of 257396434027 is 720434693752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 257396434027 - 2²³ = 257388045419 is a prime.

It is not a weakly prime, because it can be changed into another prime (257396434727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128698217013 + 128698217014.

It is an arithmetic number, because the mean of its divisors is an integer number (128698217014).

Almost surely, 2^257396434027 is an apocalyptic number.

257396434027 is a deficient number, since it is larger than the sum of its proper divisors (1).

257396434027 is an equidigital number, since it uses as much as digits as its factorization.

257396434027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7620480, while the sum is 52.

The spelling of 257396434027 in words is "two hundred fifty-seven billion, three hundred ninety-six million, four hundred thirty-four thousand, twenty-seven".