28575216099 has 8 divisors (see below), whose sum is σ = 42333653520. Its totient is φ = 19050144048.

The previous prime is 28575216073. The next prime is 28575216127. The reversal of 28575216099 is 99061257582.

28575216099 is a `hidden beast` number, since 2 + 8 + 5 + 7 + 5 + 21 + 609 + 9 = 666.

It is not a de Polignac number, because 28575216099 - 2⁵ = 28575216067 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28575216029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 529170642 + ... + 529170695.

It is an arithmetic number, because the mean of its divisors is an integer number (5291706690).

Almost surely, 2^28575216099 is an apocalyptic number.

28575216099 is a deficient number, since it is larger than the sum of its proper divisors (13758437421).

28575216099 is a wasteful number, since it uses less digits than its factorization.

28575216099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1058341346 (or 1058341340 counting only the distinct ones).

The product of its (nonzero) digits is 2721600, while the sum is 54.

The spelling of 28575216099 in words is "twenty-eight billion, five hundred seventy-five million, two hundred sixteen thousand, ninety-nine".