685659556 has 6 divisors (see below), whose sum is σ = 1199904230. Its totient is φ = 342829776.

The previous prime is 685659511. The next prime is 685659599. The reversal of 685659556 is 655956586.

685659556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 684659556 + 1000000 = 26166^2 + 1000^2 .

It is a junction number, because it is equal to n+sod(n) for n = 685659497 and 685659506.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85707441 + ... + 85707448.

Almost surely, 2^685659556 is an apocalyptic number.

It is an amenable number.

685659556 is a deficient number, since it is larger than the sum of its proper divisors (514244674).

685659556 is a wasteful number, since it uses less digits than its factorization.

685659556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171414893 (or 171414891 counting only the distinct ones).

The product of its digits is 9720000, while the sum is 55.

The square root of 685659556 is about 26185.1017947229. The cubic root of 685659556 is about 881.7988153558.

The spelling of 685659556 in words is "six hundred eighty-five million, six hundred fifty-nine thousand, five hundred fifty-six".