2639565938 has 16 divisors (see below), whose sum is σ = 3972157056. Its totient is φ = 1315521120.

The previous prime is 2639565893. The next prime is 2639565941. The reversal of 2639565938 is 8395659362.

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, 1440683 + ... + 1442513.

It is an arithmetic number, because the mean of its divisors is an integer number (248259816).

Almost surely, 2^2639565938 is an apocalyptic number.

2639565938 is a deficient number, since it is larger than the sum of its proper divisors (1332591118).

2639565938 is a wasteful number, since it uses less digits than its factorization.

2639565938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3769.

The product of its digits is 10497600, while the sum is 56.

The square root of 2639565938 is about 51376.7061809143. The cubic root of 2639565938 is about 1382.0088955847.

The spelling of 2639565938 in words is "two billion, six hundred thirty-nine million, five hundred sixty-five thousand, nine hundred thirty-eight".