685996699585 has 16 divisors (see below), whose sum is σ = 827124560640. Its totient is φ = 546182714880.

The previous prime is 685996699547. The next prime is 685996699601. The reversal of 685996699585 is 585996699586.

It is a happy number.

It is not a de Polignac number, because 685996699585 - 2⁷ = 685996699457 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 986314 + ... + 1531276.

It is an arithmetic number, because the mean of its divisors is an integer number (51695285040).

Almost surely, 2^685996699585 is an apocalyptic number.

It is an amenable number.

685996699585 is a deficient number, since it is larger than the sum of its proper divisors (141127861055).

685996699585 is a wasteful number, since it uses less digits than its factorization.

685996699585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546168.

The product of its digits is 11337408000, while the sum is 85.

Subtracting from 685996699585 its reverse (585996699586), we obtain a palindrome (99999999999).

The spelling of 685996699585 in words is "six hundred eighty-five billion, nine hundred ninety-six million, six hundred ninety-nine thousand, five hundred eighty-five".