685515025317 has 4 divisors (see below), whose sum is σ = 914020033760. Its totient is φ = 457010016876.

The previous prime is 685515025289. The next prime is 685515025417. The reversal of 685515025317 is 713520515586.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 685515025317 - 2¹⁹ = 685514501029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (685515025417) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 114252504217 + ... + 114252504222.

It is an arithmetic number, because the mean of its divisors is an integer number (228505008440).

Almost surely, 2^685515025317 is an apocalyptic number.

It is an amenable number.

685515025317 is a deficient number, since it is larger than the sum of its proper divisors (228505008443).

685515025317 is a wasteful number, since it uses less digits than its factorization.

685515025317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228505008442.

The product of its (nonzero) digits is 1260000, while the sum is 48.

The spelling of 685515025317 in words is "six hundred eighty-five billion, five hundred fifteen million, twenty-five thousand, three hundred seventeen".