2688863644 has 24 divisors (see below), whose sum is σ = 4900039200. Its totient is φ = 1289467200.

The previous prime is 2688863609. The next prime is 2688863651. The reversal of 2688863644 is 4463688862.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59239 + ... + 94270.

It is an arithmetic number, because the mean of its divisors is an integer number (204168300).

Almost surely, 2^2688863644 is an apocalyptic number.

It is an amenable number.

2688863644 is a deficient number, since it is larger than the sum of its proper divisors (2211175556).

2688863644 is a wasteful number, since it uses less digits than its factorization.

2688863644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153693 (or 153691 counting only the distinct ones).

The product of its digits is 10616832, while the sum is 55.

The square root of 2688863644 is about 51854.2538660041. The cubic root of 2688863644 is about 1390.5595531975.

The spelling of 2688863644 in words is "two billion, six hundred eighty-eight million, eight hundred sixty-three thousand, six hundred forty-four".