28663384745 has 16 divisors (see below), whose sum is σ = 35681022720. Its totient is φ = 22088227200.

The previous prime is 28663384727. The next prime is 28663384747. The reversal of 28663384745 is 54748336682.

It is not a de Polignac number, because 28663384745 - 2³⁰ = 27589642921 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28663384747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 868751 + ... + 901140.

It is an arithmetic number, because the mean of its divisors is an integer number (2230063920).

Almost surely, 2^28663384745 is an apocalyptic number.

It is an amenable number.

28663384745 is a deficient number, since it is larger than the sum of its proper divisors (7017637975).

28663384745 is a wasteful number, since it uses less digits than its factorization.

28663384745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1770016.

The product of its digits is 23224320, while the sum is 56.

The spelling of 28663384745 in words is "twenty-eight billion, six hundred sixty-three million, three hundred eighty-four thousand, seven hundred forty-five".