257577855683 has 2 divisors, whose sum is σ = 257577855684. Its totient is φ = 257577855682.

The previous prime is 257577855659. The next prime is 257577855719. The reversal of 257577855683 is 386558775752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 257577855683 - 2²⁸ = 257309420227 is a prime.

It is not a weakly prime, because it can be changed into another prime (257577852683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128788927841 + 128788927842.

It is an arithmetic number, because the mean of its divisors is an integer number (128788927842).

Almost surely, 2^257577855683 is an apocalyptic number.

257577855683 is a deficient number, since it is larger than the sum of its proper divisors (1).

257577855683 is an equidigital number, since it uses as much as digits as its factorization.

257577855683 is an evil number, because the sum of its binary digits is even.

The product of its digits is 493920000, while the sum is 68.

The spelling of 257577855683 in words is "two hundred fifty-seven billion, five hundred seventy-seven million, eight hundred fifty-five thousand, six hundred eighty-three".