2161192044 has 24 divisors (see below), whose sum is σ = 5501216448. Its totient is φ = 654906640.

The previous prime is 2161192039. The next prime is 2161192049. The reversal of 2161192044 is 4402911612.

It is an interprime number because it is at equal distance from previous prime (2161192039) and next prime (2161192049).

It is not an unprimeable number, because it can be changed into a prime (2161192049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8186202 + ... + 8186465.

It is an arithmetic number, because the mean of its divisors is an integer number (229217352).

Almost surely, 2^2161192044 is an apocalyptic number.

It is an amenable number.

2161192044 is an abundant number, since it is smaller than the sum of its proper divisors (3340024404).

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

2161192044 is a wasteful number, since it uses less digits than its factorization.

2161192044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16372685 (or 16372683 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 2161192044 is about 46488.6227371816. The cubic root of 2161192044 is about 1292.8985648205.

The spelling of 2161192044 in words is "two billion, one hundred sixty-one million, one hundred ninety-two thousand, forty-four".