1686808636 has 12 divisors (see below), whose sum is σ = 2952546912. Its totient is φ = 843223808.

The previous prime is 1686808633. The next prime is 1686808637. The reversal of 1686808636 is 6368086861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1686808631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22885 + ... + 62428.

It is an arithmetic number, because the mean of its divisors is an integer number (246045576).

Almost surely, 2^1686808636 is an apocalyptic number.

It is an amenable number.

1686808636 is a deficient number, since it is larger than the sum of its proper divisors (1265738276).

1686808636 is a wasteful number, since it uses less digits than its factorization.

1686808636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90260 (or 90258 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 52.

The square root of 1686808636 is about 41070.7759361812. The cubic root of 1686808636 is about 1190.3881783314.

The spelling of 1686808636 in words is "one billion, six hundred eighty-six million, eight hundred eight thousand, six hundred thirty-six".