2161662684 has 24 divisors (see below), whose sum is σ = 5044720128. Its totient is φ = 720434160.

The previous prime is 2161662683. The next prime is 2161662689. The reversal of 2161662684 is 4862661612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161662683) 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, 88629 + ... + 110355.

It is an arithmetic number, because the mean of its divisors is an integer number (210196672).

Almost surely, 2^2161662684 is an apocalyptic number.

It is an amenable number.

2161662684 is an abundant number, since it is smaller than the sum of its proper divisors (2883057444).

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

2161662684 is a wasteful number, since it uses less digits than its factorization.

2161662684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30025 (or 30023 counting only the distinct ones).

The product of its digits is 165888, while the sum is 42.

The square root of 2161662684 is about 46493.6843452958. The cubic root of 2161662684 is about 1292.9924089589.

The spelling of 2161662684 in words is "two billion, one hundred sixty-one million, six hundred sixty-two thousand, six hundred eighty-four".