2639012764 has 12 divisors (see below), whose sum is σ = 4767249088. Its totient is φ = 1276941600.

The previous prime is 2639012741. The next prime is 2639012767. The reversal of 2639012764 is 4672109362.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2639012767) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10641057 + ... + 10641304.

Almost surely, 2^2639012764 is an apocalyptic number.

It is an amenable number.

2639012764 is a deficient number, since it is larger than the sum of its proper divisors (2128236324).

2639012764 is a wasteful number, since it uses less digits than its factorization.

2639012764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21282396 (or 21282394 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 40.

The square root of 2639012764 is about 51371.3223890528. The cubic root of 2639012764 is about 1381.9123462759.

The spelling of 2639012764 in words is "two billion, six hundred thirty-nine million, twelve thousand, seven hundred sixty-four".