257136770339 has 2 divisors, whose sum is σ = 257136770340. Its totient is φ = 257136770338.

The previous prime is 257136770321. The next prime is 257136770347. The reversal of 257136770339 is 933077631752.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 257136770339 - 2⁸ = 257136770083 is a prime.

It is a super-2 number, since 2×257136770339² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (257136770039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128568385169 + 128568385170.

It is an arithmetic number, because the mean of its divisors is an integer number (128568385170).

Almost surely, 2^257136770339 is an apocalyptic number.

257136770339 is a deficient number, since it is larger than the sum of its proper divisors (1).

257136770339 is an equidigital number, since it uses as much as digits as its factorization.

257136770339 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5000940, while the sum is 53.

The spelling of 257136770339 in words is "two hundred fifty-seven billion, one hundred thirty-six million, seven hundred seventy thousand, three hundred thirty-nine".