2639948564 has 48 divisors (see below), whose sum is σ = 5366450880. Its totient is φ = 1123023360.

The previous prime is 2639948551. The next prime is 2639948599. The reversal of 2639948564 is 4658499362.

It is a happy number.

2639948564 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124034 + ... + 143750.

It is an arithmetic number, because the mean of its divisors is an integer number (111801060).

Almost surely, 2^2639948564 is an apocalyptic number.

It is an amenable number.

2639948564 is an abundant number, since it is smaller than the sum of its proper divisors (2726502316).

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

2639948564 is a wasteful number, since it uses less digits than its factorization.

2639948564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19928 (or 19926 counting only the distinct ones).

The product of its digits is 11197440, while the sum is 56.

The square root of 2639948564 is about 51380.4297763263. The cubic root of 2639948564 is about 1382.0756700720.

The spelling of 2639948564 in words is "two billion, six hundred thirty-nine million, nine hundred forty-eight thousand, five hundred sixty-four".