2139308664 has 32 divisors (see below), whose sum is σ = 5408370000. Its totient is φ = 705089792.

The previous prime is 2139308651. The next prime is 2139308711. The reversal of 2139308664 is 4668039312.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 498639 + ... + 502910.

Almost surely, 2^2139308664 is an apocalyptic number.

2139308664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2139308664 is an abundant number, since it is smaller than the sum of its proper divisors (3269061336).

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

2139308664 is a wasteful number, since it uses less digits than its factorization.

2139308664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001647 (or 1001643 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 42.

The square root of 2139308664 is about 46252.6611558730. The cubic root of 2139308664 is about 1288.5199587207.

The spelling of 2139308664 in words is "two billion, one hundred thirty-nine million, three hundred eight thousand, six hundred sixty-four".