257610085 has 8 divisors (see below), whose sum is σ = 310365216. Its totient is φ = 205266000.

The previous prime is 257610071. The next prime is 257610091. The reversal of 257610085 is 580016752.

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

It is not a de Polignac number, because 257610085 - 2⁵ = 257610053 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 257610085.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101379 + ... + 103888.

It is an arithmetic number, because the mean of its divisors is an integer number (38795652).

Almost surely, 2^257610085 is an apocalyptic number.

It is an amenable number.

257610085 is a deficient number, since it is larger than the sum of its proper divisors (52755131).

257610085 is a wasteful number, since it uses less digits than its factorization.

257610085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205523.

The product of its (nonzero) digits is 16800, while the sum is 34.

The square root of 257610085 is about 16050.2362910955. The cubic root of 257610085 is about 636.2888119414.

The spelling of 257610085 in words is "two hundred fifty-seven million, six hundred ten thousand, eighty-five".