28668533759 has 4 divisors (see below), whose sum is σ = 28676266920. Its totient is φ = 28660800600.

The previous prime is 28668533753. The next prime is 28668533767. The reversal of 28668533759 is 95733586682.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28668533759 - 2²⁰ = 28667485183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28668533753) 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 3 ways as a sum of consecutive naturals, for example, 3861017 + ... + 3868434.

It is an arithmetic number, because the mean of its divisors is an integer number (7169066730).

Almost surely, 2^28668533759 is an apocalyptic number.

28668533759 is a deficient number, since it is larger than the sum of its proper divisors (7733161).

28668533759 is an equidigital number, since it uses as much as digits as its factorization.

28668533759 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7733160.

The product of its digits is 65318400, while the sum is 62.

The spelling of 28668533759 in words is "twenty-eight billion, six hundred sixty-eight million, five hundred thirty-three thousand, seven hundred fifty-nine".