257550025775 has 18 divisors (see below), whose sum is σ = 371502773640. Its totient is φ = 176605731120.

The previous prime is 257550025763. The next prime is 257550025781. The reversal of 257550025775 is 577520055752.

It is a happy number.

It is not a de Polignac number, because 257550025775 - 2¹² = 257550021679 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 105121235 + ... + 105123684.

It is an arithmetic number, because the mean of its divisors is an integer number (20639042980).

Almost surely, 2^257550025775 is an apocalyptic number.

257550025775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

257550025775 is a deficient number, since it is larger than the sum of its proper divisors (113952747865).

257550025775 is a wasteful number, since it uses less digits than its factorization.

257550025775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210244943 (or 210244931 counting only the distinct ones).

The product of its (nonzero) digits is 4287500, while the sum is 50.

The spelling of 257550025775 in words is "two hundred fifty-seven billion, five hundred fifty million, twenty-five thousand, seven hundred seventy-five".