685609052525 has 12 divisors (see below), whose sum is σ = 894900237600. Its totient is φ = 519619492080.

The previous prime is 685609052509. The next prime is 685609052549. The reversal of 685609052525 is 525250906586.

It is not a de Polignac number, because 685609052525 - 2⁴ = 685609052509 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 721693265 + ... + 721694214.

It is an arithmetic number, because the mean of its divisors is an integer number (74575019800).

Almost surely, 2^685609052525 is an apocalyptic number.

It is an amenable number.

685609052525 is a deficient number, since it is larger than the sum of its proper divisors (209291185075).

685609052525 is a wasteful number, since it uses less digits than its factorization.

685609052525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1443387508 (or 1443387503 counting only the distinct ones).

The product of its (nonzero) digits is 6480000, while the sum is 53.

The spelling of 685609052525 in words is "six hundred eighty-five billion, six hundred nine million, fifty-two thousand, five hundred twenty-five".