28511983664 has 10 divisors (see below), whose sum is σ = 55241968380. Its totient is φ = 14255991824.

The previous prime is 28511983657. The next prime is 28511983681. The reversal of 28511983664 is 46638911582.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 890999474 + ... + 890999505.

It is an arithmetic number, because the mean of its divisors is an integer number (5524196838).

Almost surely, 2^28511983664 is an apocalyptic number.

It is an amenable number.

28511983664 is a deficient number, since it is larger than the sum of its proper divisors (26729984716).

28511983664 is a wasteful number, since it uses less digits than its factorization.

28511983664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1781998987 (or 1781998981 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 53.

The spelling of 28511983664 in words is "twenty-eight billion, five hundred eleven million, nine hundred eighty-three thousand, six hundred sixty-four".