28825697664625 has 64 divisors (see below), whose sum is σ = 36524390842368. Its totient is φ = 22710692088000.

The previous prime is 28825697664623. The next prime is 28825697664629. The reversal of 28825697664625 is 52646679652882.

It is not a de Polignac number, because 28825697664625 - 2¹ = 28825697664623 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28825697664623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4300414024 + ... + 4300420726.

It is an arithmetic number, because the mean of its divisors is an integer number (570693606912).

Almost surely, 2^{28825697664625} is an apocalyptic number.

28825697664625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28825697664625 is a deficient number, since it is larger than the sum of its proper divisors (7698693177743).

28825697664625 is a wasteful number, since it uses less digits than its factorization.

28825697664625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8615 (or 8605 counting only the distinct ones).

The product of its digits is 4180377600, while the sum is 76.

The spelling of 28825697664625 in words is "twenty-eight trillion, eight hundred twenty-five billion, six hundred ninety-seven million, six hundred sixty-four thousand, six hundred twenty-five".