28559282217 has 4 divisors (see below), whose sum is σ = 38079042960. Its totient is φ = 19039521476.

The previous prime is 28559282207. The next prime is 28559282221. The reversal of 28559282217 is 71228295582.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28559282217 - 2¹⁸ = 28559020073 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28559282217.

It is not an unprimeable number, because it can be changed into a prime (28559282207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4759880367 + ... + 4759880372.

It is an arithmetic number, because the mean of its divisors is an integer number (9519760740).

Almost surely, 2^28559282217 is an apocalyptic number.

It is an amenable number.

28559282217 is a deficient number, since it is larger than the sum of its proper divisors (9519760743).

28559282217 is an equidigital number, since it uses as much as digits as its factorization.

28559282217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9519760742.

The product of its digits is 1612800, while the sum is 51.

The spelling of 28559282217 in words is "twenty-eight billion, five hundred fifty-nine million, two hundred eighty-two thousand, two hundred seventeen".