2109656886 has 16 divisors (see below), whose sum is σ = 4322224368. Its totient is φ = 686067200.

The previous prime is 2109656851. The next prime is 2109656893. The reversal of 2109656886 is 6886569012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4287675 + ... + 4288166.

It is an arithmetic number, because the mean of its divisors is an integer number (270139023).

Almost surely, 2^2109656886 is an apocalyptic number.

2109656886 is an abundant number, since it is smaller than the sum of its proper divisors (2212567482).

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

2109656886 is a wasteful number, since it uses less digits than its factorization.

2109656886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8575887.

The product of its (nonzero) digits is 1244160, while the sum is 51.

The square root of 2109656886 is about 45931.0013607367. The cubic root of 2109656886 is about 1282.5390855554.

The spelling of 2109656886 in words is "two billion, one hundred nine million, six hundred fifty-six thousand, eight hundred eighty-six".