28550043499 has 4 divisors (see below), whose sum is σ = 28550555136. Its totient is φ = 28549531864.

The previous prime is 28550043437. The next prime is 28550043503. The reversal of 28550043499 is 99434005582.

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 28550043499 - 2³¹ = 26402559851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28550043409) 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, 160204 + ... + 287689.

It is an arithmetic number, because the mean of its divisors is an integer number (7137638784).

Almost surely, 2^28550043499 is an apocalyptic number.

28550043499 is a deficient number, since it is larger than the sum of its proper divisors (511637).

28550043499 is an equidigital number, since it uses as much as digits as its factorization.

28550043499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 511636.

The product of its (nonzero) digits is 1555200, while the sum is 49.

The spelling of 28550043499 in words is "twenty-eight billion, five hundred fifty million, forty-three thousand, four hundred ninety-nine".