2163934645 has 8 divisors (see below), whose sum is σ = 2709622656. Its totient is φ = 1655880336.

The previous prime is 2163934639. The next prime is 2163934657. The reversal of 2163934645 is 5464393612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2163934645 - 2³ = 2163934637 is a prime.

It is a super-2 number, since 2×2163934645² = 9365226295662552050, which contains 22 as substring.

It is a Duffinian number.

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, 9408297 + ... + 9408526.

It is an arithmetic number, because the mean of its divisors is an integer number (338702832).

Almost surely, 2^2163934645 is an apocalyptic number.

It is an amenable number.

2163934645 is a deficient number, since it is larger than the sum of its proper divisors (545688011).

2163934645 is a wasteful number, since it uses less digits than its factorization.

2163934645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18816851.

The product of its digits is 466560, while the sum is 43.

The square root of 2163934645 is about 46518.1109354196. The cubic root of 2163934645 is about 1293.4452393620.

The spelling of 2163934645 in words is "two billion, one hundred sixty-three million, nine hundred thirty-four thousand, six hundred forty-five".