2166115116 has 48 divisors (see below), whose sum is σ = 5648243328. Its totient is φ = 640387200.

The previous prime is 2166115109. The next prime is 2166115139. The reversal of 2166115116 is 6115116612.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 194710 + ... + 205533.

It is an arithmetic number, because the mean of its divisors is an integer number (117671736).

Almost surely, 2^2166115116 is an apocalyptic number.

It is an amenable number.

2166115116 is an abundant number, since it is smaller than the sum of its proper divisors (3482128212).

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

2166115116 is a wasteful number, since it uses less digits than its factorization.

2166115116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400302 (or 400300 counting only the distinct ones).

The product of its digits is 2160, while the sum is 30.

The square root of 2166115116 is about 46541.5418309278. The cubic root of 2166115116 is about 1293.8795366855.

The spelling of 2166115116 in words is "two billion, one hundred sixty-six million, one hundred fifteen thousand, one hundred sixteen".