28609813579 has 4 divisors (see below), whose sum is σ = 28610941240. Its totient is φ = 28608685920.

The previous prime is 28609813577. The next prime is 28609813601. The reversal of 28609813579 is 97531890682.

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 28609813579 - 2¹ = 28609813577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28609813577) 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 3 ways as a sum of consecutive naturals, for example, 524877 + ... + 576814.

It is an arithmetic number, because the mean of its divisors is an integer number (7152735310).

Almost surely, 2^28609813579 is an apocalyptic number.

28609813579 is a deficient number, since it is larger than the sum of its proper divisors (1127661).

28609813579 is a wasteful number, since it uses less digits than its factorization.

28609813579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1127660.

The product of its (nonzero) digits is 6531840, while the sum is 58.

The spelling of 28609813579 in words is "twenty-eight billion, six hundred nine million, eight hundred thirteen thousand, five hundred seventy-nine".