28531716168 has 64 divisors (see below), whose sum is σ = 77112792000. Its totient is φ = 8766496512.

The previous prime is 28531716079. The next prime is 28531716181. The reversal of 28531716168 is 86161713582.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 828663 + ... + 862406.

It is an arithmetic number, because the mean of its divisors is an integer number (1204887375).

Almost surely, 2^28531716168 is an apocalyptic number.

It is an amenable number.

28531716168 is an abundant number, since it is smaller than the sum of its proper divisors (48581075832).

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

28531716168 is a wasteful number, since it uses less digits than its factorization.

28531716168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1691134 (or 1691130 counting only the distinct ones).

The product of its digits is 483840, while the sum is 48.

The spelling of 28531716168 in words is "twenty-eight billion, five hundred thirty-one million, seven hundred sixteen thousand, one hundred sixty-eight".