257375095257 has 8 divisors (see below), whose sum is σ = 392190621376. Its totient is φ = 147071482992.

The previous prime is 257375095253. The next prime is 257375095261. The reversal of 257375095257 is 752590573752.

It is an interprime number because it is at equal distance from previous prime (257375095253) and next prime (257375095261).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 257375095257 - 2² = 257375095253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 257375095197 and 257375095206.

It is not an unprimeable number, because it can be changed into a prime (257375095253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6127978438 + ... + 6127978479.

It is an arithmetic number, because the mean of its divisors is an integer number (49023827672).

Almost surely, 2^257375095257 is an apocalyptic number.

It is an amenable number.

257375095257 is a deficient number, since it is larger than the sum of its proper divisors (134815526119).

257375095257 is a wasteful number, since it uses less digits than its factorization.

257375095257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12255956927.

The product of its (nonzero) digits is 23152500, while the sum is 57.

The spelling of 257375095257 in words is "two hundred fifty-seven billion, three hundred seventy-five million, ninety-five thousand, two hundred fifty-seven".