257977125671 has 2 divisors, whose sum is σ = 257977125672. Its totient is φ = 257977125670.

The previous prime is 257977125643. The next prime is 257977125673. The reversal of 257977125671 is 176521779752.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 257977125671 - 2¹⁸ = 257976863527 is a prime.

Together with 257977125673, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 257977125671.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257977125673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128988562835 + 128988562836.

It is an arithmetic number, because the mean of its divisors is an integer number (128988562836).

Almost surely, 2^257977125671 is an apocalyptic number.

257977125671 is a deficient number, since it is larger than the sum of its proper divisors (1).

257977125671 is an equidigital number, since it uses as much as digits as its factorization.

257977125671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12965400, while the sum is 59.

The spelling of 257977125671 in words is "two hundred fifty-seven billion, nine hundred seventy-seven million, one hundred twenty-five thousand, six hundred seventy-one".