6639604031 has 16 divisors (see below), whose sum is σ = 7101398304. Its totient is φ = 6185985024.

The previous prime is 6639604019. The next prime is 6639604033. The reversal of 6639604031 is 1304069366.

It is not a de Polignac number, because 6639604031 - 2¹⁸ = 6639341887 is a prime.

It is a super-2 number, since 2×6639604031² = 88168683376942897922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6639604033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 864896 + ... + 872538.

It is an arithmetic number, because the mean of its divisors is an integer number (443837394).

Almost surely, 2^6639604031 is an apocalyptic number.

6639604031 is a deficient number, since it is larger than the sum of its proper divisors (461794273).

6639604031 is a wasteful number, since it uses less digits than its factorization.

6639604031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8170.

The product of its (nonzero) digits is 69984, while the sum is 38.

The square root of 6639604031 is about 81483.7654444123. The cubic root of 6639604031 is about 1879.5219124403.

The spelling of 6639604031 in words is "six billion, six hundred thirty-nine million, six hundred four thousand, thirty-one".