257573685 has 16 divisors (see below), whose sum is σ = 422170560. Its totient is φ = 134021760.

The previous prime is 257573639. The next prime is 257573689. The reversal of 257573685 is 586375752.

It is not a de Polignac number, because 257573685 - 2¹⁶ = 257508149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257573689) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 208795 + ... + 210024.

It is an arithmetic number, because the mean of its divisors is an integer number (26385660).

Almost surely, 2^257573685 is an apocalyptic number.

It is an amenable number.

257573685 is a deficient number, since it is larger than the sum of its proper divisors (164596875).

257573685 is a wasteful number, since it uses less digits than its factorization.

257573685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418868.

The product of its digits is 1764000, while the sum is 48.

The square root of 257573685 is about 16049.1023113444. The cubic root of 257573685 is about 636.2588415779.

The spelling of 257573685 in words is "two hundred fifty-seven million, five hundred seventy-three thousand, six hundred eighty-five".