2117186645 has 16 divisors (see below), whose sum is σ = 2929271040. Its totient is φ = 1438934784.

The previous prime is 2117186627. The next prime is 2117186651. The reversal of 2117186645 is 5466817112.

It is not a de Polignac number, because 2117186645 - 2²² = 2112992341 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 263705 + ... + 271614.

It is an arithmetic number, because the mean of its divisors is an integer number (183079440).

Almost surely, 2^2117186645 is an apocalyptic number.

It is an amenable number.

2117186645 is a deficient number, since it is larger than the sum of its proper divisors (812084395).

2117186645 is a wasteful number, since it uses less digits than its factorization.

2117186645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535444.

The product of its digits is 80640, while the sum is 41.

The square root of 2117186645 is about 46012.8965073924. The cubic root of 2117186645 is about 1284.0631475253.

The spelling of 2117186645 in words is "two billion, one hundred seventeen million, one hundred eighty-six thousand, six hundred forty-five".