2116636686 has 24 divisors (see below), whose sum is σ = 4785440400. Its totient is φ = 674869536.

The previous prime is 2116636661. The next prime is 2116636721. The reversal of 2116636686 is 6866366112.

2116636686 is a `hidden beast` number, since 2 + 1 + 1 + 6 + 636 + 6 + 8 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2555911 + ... + 2556738.

It is an arithmetic number, because the mean of its divisors is an integer number (199393350).

Almost surely, 2^2116636686 is an apocalyptic number.

2116636686 is an abundant number, since it is smaller than the sum of its proper divisors (2668803714).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2116636686 is a wasteful number, since it uses less digits than its factorization.

2116636686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5112680 (or 5112677 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The square root of 2116636686 is about 46006.9199794987. The cubic root of 2116636686 is about 1283.9519554329.

The spelling of 2116636686 in words is "two billion, one hundred sixteen million, six hundred thirty-six thousand, six hundred eighty-six".