2686623656 has 32 divisors (see below), whose sum is σ = 5067247680. Its totient is φ = 1335379200.

The previous prime is 2686623631. The next prime is 2686623661. The reversal of 2686623656 is 6563266862.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1709351 + ... + 1710921.

It is an arithmetic number, because the mean of its divisors is an integer number (158351490).

Almost surely, 2^2686623656 is an apocalyptic number.

It is an amenable number.

2686623656 is a deficient number, since it is larger than the sum of its proper divisors (2380624024).

2686623656 is a wasteful number, since it uses less digits than its factorization.

2686623656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2705 (or 2701 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 50.

The square root of 2686623656 is about 51832.6504821044. The cubic root of 2686623656 is about 1390.1733055138.

The spelling of 2686623656 in words is "two billion, six hundred eighty-six million, six hundred twenty-three thousand, six hundred fifty-six".