28725663515896 has 16 divisors (see below), whose sum is σ = 53879725420200. Its totient is φ = 14357736737184.

The previous prime is 28725663515867. The next prime is 28725663515909. The reversal of 28725663515896 is 69851536652782.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 636853635 + ... + 636898738.

Almost surely, 2^{28725663515896} is an apocalyptic number.

It is an amenable number.

28725663515896 is a deficient number, since it is larger than the sum of its proper divisors (25154061904304).

28725663515896 is a wasteful number, since it uses less digits than its factorization.

28725663515896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1273755198 (or 1273755194 counting only the distinct ones).

The product of its digits is 1306368000, while the sum is 73.

The spelling of 28725663515896 in words is "twenty-eight trillion, seven hundred twenty-five billion, six hundred sixty-three million, five hundred fifteen thousand, eight hundred ninety-six".