2640994264 has 16 divisors (see below), whose sum is σ = 5011526520. Its totient is φ = 1304587200.

The previous prime is 2640994261. The next prime is 2640994271. The reversal of 2640994264 is 4624990462.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640994261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1988037 + ... + 1989364.

Almost surely, 2^2640994264 is an apocalyptic number.

It is an amenable number.

2640994264 is a deficient number, since it is larger than the sum of its proper divisors (2370532256).

2640994264 is a wasteful number, since it uses less digits than its factorization.

2640994264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3977490 (or 3977486 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 46.

The square root of 2640994264 is about 51390.6048222824. The cubic root of 2640994264 is about 1382.2581288981.

The spelling of 2640994264 in words is "two billion, six hundred forty million, nine hundred ninety-four thousand, two hundred sixty-four".