28489173664499 has 4 divisors (see below), whose sum is σ = 28489186008336. Its totient is φ = 28489161320664.

The previous prime is 28489173664339. The next prime is 28489173664513. The reversal of 28489173664499 is 99446637198482.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28489173664499 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28489173669499) 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, 1562444 + ... + 7708409.

It is an arithmetic number, because the mean of its divisors is an integer number (7122296502084).

Almost surely, 2^{28489173664499} is an apocalyptic number.

28489173664499 is a deficient number, since it is larger than the sum of its proper divisors (12343837).

28489173664499 is an equidigital number, since it uses as much as digits as its factorization.

28489173664499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12343836.

The product of its digits is 4514807808, while the sum is 80.

The spelling of 28489173664499 in words is "twenty-eight trillion, four hundred eighty-nine billion, one hundred seventy-three million, six hundred sixty-four thousand, four hundred ninety-nine".