28681810559 has 8 divisors (see below), whose sum is σ = 30523136688. Its totient is φ = 26857613440.

The previous prime is 28681810529. The next prime is 28681810571. The reversal of 28681810559 is 95501818682.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28681810559 - 2¹² = 28681806463 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28681810559.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28681810529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4278797 + ... + 4285494.

It is an arithmetic number, because the mean of its divisors is an integer number (3815392086).

Almost surely, 2^28681810559 is an apocalyptic number.

28681810559 is a deficient number, since it is larger than the sum of its proper divisors (1841326129).

28681810559 is a wasteful number, since it uses less digits than its factorization.

28681810559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8564505.

The product of its (nonzero) digits is 1382400, while the sum is 53.

The spelling of 28681810559 in words is "twenty-eight billion, six hundred eighty-one million, eight hundred ten thousand, five hundred fifty-nine".