2161692804 has 12 divisors (see below), whose sum is σ = 5043949904. Its totient is φ = 720564264.

The previous prime is 2161692737. The next prime is 2161692809. The reversal of 2161692804 is 4082961612.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (2161692809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90070522 + ... + 90070545.

Almost surely, 2^2161692804 is an apocalyptic number.

It is an amenable number.

2161692804 is an abundant number, since it is smaller than the sum of its proper divisors (2882257100).

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

2161692804 is a wasteful number, since it uses less digits than its factorization.

2161692804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180141074 (or 180141072 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 2161692804 is about 46494.0082591295. The cubic root of 2161692804 is about 1292.9984143285.

The spelling of 2161692804 in words is "two billion, one hundred sixty-one million, six hundred ninety-two thousand, eight hundred four".