685806203708 has 24 divisors (see below), whose sum is σ = 1206367694448. Its totient is φ = 341133676416.

The previous prime is 685806203659. The next prime is 685806203723. The reversal of 685806203708 is 807302608586.

It is a self number, because there is not a number n which added to its sum of digits gives 685806203708.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 199760 + ... + 1188072.

It is an arithmetic number, because the mean of its divisors is an integer number (50265320602).

Almost surely, 2^685806203708 is an apocalyptic number.

It is an amenable number.

685806203708 is a deficient number, since it is larger than the sum of its proper divisors (520561490740).

685806203708 is a wasteful number, since it uses less digits than its factorization.

685806203708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 989213 (or 989211 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 53.

The spelling of 685806203708 in words is "six hundred eighty-five billion, eight hundred six million, two hundred three thousand, seven hundred eight".