2656961872 has 40 divisors (see below), whose sum is σ = 5247521280. Its totient is φ = 1302890880.

The previous prime is 2656961869. The next prime is 2656961899. The reversal of 2656961872 is 2781696562.

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, 346593 + ... + 354175.

It is an arithmetic number, because the mean of its divisors is an integer number (131188032).

Almost surely, 2^2656961872 is an apocalyptic number.

It is an amenable number.

2656961872 is a deficient number, since it is larger than the sum of its proper divisors (2590559408).

2656961872 is a wasteful number, since it uses less digits than its factorization.

2656961872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8011 (or 8005 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 52.

The square root of 2656961872 is about 51545.7260303898. The cubic root of 2656961872 is about 1385.0382716511.

The spelling of 2656961872 in words is "two billion, six hundred fifty-six million, nine hundred sixty-one thousand, eight hundred seventy-two".