2131638688 has 12 divisors (see below), whose sum is σ = 4196663730. Its totient is φ = 1065819328.

The previous prime is 2131638661. The next prime is 2131638727. The reversal of 2131638688 is 8868361312.

It can be written as a sum of positive squares in only one way, i.e., 1193564304 + 938074384 = 34548^2 + 30628^2 .

It is a super-2 number, since 2×2131638688² = 9087766992356722688, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33306823 + ... + 33306886.

Almost surely, 2^2131638688 is an apocalyptic number.

It is an amenable number.

2131638688 is a deficient number, since it is larger than the sum of its proper divisors (2065025042).

2131638688 is an equidigital number, since it uses as much as digits as its factorization.

2131638688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66613719 (or 66613711 counting only the distinct ones).

The product of its digits is 331776, while the sum is 46.

The square root of 2131638688 is about 46169.6728166878. The cubic root of 2131638688 is about 1286.9782220767.

The spelling of 2131638688 in words is "two billion, one hundred thirty-one million, six hundred thirty-eight thousand, six hundred eighty-eight".