2639013764 has 6 divisors (see below), whose sum is σ = 4618274094. Its totient is φ = 1319506880.

The previous prime is 2639013709. The next prime is 2639013803. The reversal of 2639013764 is 4673109362.

It can be written as a sum of positive squares in only one way, i.e., 2624512900 + 14500864 = 51230^2 + 3808^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 329876717 + ... + 329876724.

It is an arithmetic number, because the mean of its divisors is an integer number (769712349).

Almost surely, 2^2639013764 is an apocalyptic number.

It is an amenable number.

2639013764 is a deficient number, since it is larger than the sum of its proper divisors (1979260330).

2639013764 is a wasteful number, since it uses less digits than its factorization.

2639013764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 659753445 (or 659753443 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 41.

The square root of 2639013764 is about 51371.3321221087. The cubic root of 2639013764 is about 1381.9125208251.

The spelling of 2639013764 in words is "two billion, six hundred thirty-nine million, thirteen thousand, seven hundred sixty-four".