684563636 has 12 divisors (see below), whose sum is σ = 1198414560. Its totient is φ = 342159480.

The previous prime is 684563623. The next prime is 684563639. The reversal of 684563636 is 636365486.

684563636 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684563639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17360 + ... + 40871.

It is an arithmetic number, because the mean of its divisors is an integer number (99867880).

Almost surely, 2^684563636 is an apocalyptic number.

It is an amenable number.

684563636 is a deficient number, since it is larger than the sum of its proper divisors (513850924).

684563636 is a wasteful number, since it uses less digits than its factorization.

684563636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61174 (or 61172 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 47.

The square root of 684563636 is about 26164.1670228578. The cubic root of 684563636 is about 881.3287588111.

The spelling of 684563636 in words is "six hundred eighty-four million, five hundred sixty-three thousand, six hundred thirty-six".