685499994585 has 48 divisors (see below), whose sum is σ = 1358001066240. Its totient is φ = 313357991040.

The previous prime is 685499994527. The next prime is 685499994661. The reversal of 685499994585 is 585499994586.

685499994585 is a `hidden beast` number, since 6 + 8 + 5 + 499 + 9 + 9 + 45 + 85 = 666.

It is not a de Polignac number, because 685499994585 - 2⁹ = 685499994073 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14614951 + ... + 14661779.

It is an arithmetic number, because the mean of its divisors is an integer number (28291688880).

Almost surely, 2^685499994585 is an apocalyptic number.

It is an amenable number.

685499994585 is a deficient number, since it is larger than the sum of its proper divisors (672501071655).

685499994585 is a wasteful number, since it uses less digits than its factorization.

685499994585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93318 (or 93315 counting only the distinct ones).

The product of its digits is 5038848000, while the sum is 81.

Subtracting from 685499994585 its reverse (585499994586), we obtain a palindrome (99999999999).

The spelling of 685499994585 in words is "six hundred eighty-five billion, four hundred ninety-nine million, nine hundred ninety-four thousand, five hundred eighty-five".