257710671671 has 2 divisors, whose sum is σ = 257710671672. Its totient is φ = 257710671670.

The previous prime is 257710671661. The next prime is 257710671721. The reversal of 257710671671 is 176176017752.

It is an a-pointer prime, because the next prime (257710671721) can be obtained adding 257710671671 to its sum of digits (50).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-257710671671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257710671611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128855335835 + 128855335836.

It is an arithmetic number, because the mean of its divisors is an integer number (128855335836).

Almost surely, 2^257710671671 is an apocalyptic number.

257710671671 is a deficient number, since it is larger than the sum of its proper divisors (1).

257710671671 is an equidigital number, since it uses as much as digits as its factorization.

257710671671 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864360, while the sum is 50.

The spelling of 257710671671 in words is "two hundred fifty-seven billion, seven hundred ten million, six hundred seventy-one thousand, six hundred seventy-one".