2163061638 has 16 divisors (see below), whose sum is σ = 4806803760. Its totient is φ = 721020528.

The previous prime is 2163061619. The next prime is 2163061643. The reversal of 2163061638 is 8361603612.

2163061638 is a `hidden beast` number, since 2 + 1 + 6 + 3 + 0 + 616 + 38 = 666.

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, 20028295 + ... + 20028402.

It is an arithmetic number, because the mean of its divisors is an integer number (300425235).

Almost surely, 2^2163061638 is an apocalyptic number.

2163061638 is an abundant number, since it is smaller than the sum of its proper divisors (2643742122).

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

2163061638 is a wasteful number, since it uses less digits than its factorization.

2163061638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40056708 (or 40056702 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 2163061638 is about 46508.7264714913. The cubic root of 2163061638 is about 1293.2712756002.

The spelling of 2163061638 in words is "two billion, one hundred sixty-three million, sixty-one thousand, six hundred thirty-eight".