28324450565 has 16 divisors (see below), whose sum is σ = 34369232688. Its totient is φ = 22406701056.

The previous prime is 28324450549. The next prime is 28324450577. The reversal of 28324450565 is 56505442382.

It can be written as a sum of positive squares in 8 ways, for example, as 317089249 + 28007361316 = 17807^2 + 167354^2 .

It is a cyclic number.

It is not a de Polignac number, because 28324450565 - 2⁴ = 28324450549 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 554129 + ... + 603081.

It is an arithmetic number, because the mean of its divisors is an integer number (2148077043).

Almost surely, 2^28324450565 is an apocalyptic number.

It is an amenable number.

28324450565 is a deficient number, since it is larger than the sum of its proper divisors (6044782123).

28324450565 is a wasteful number, since it uses less digits than its factorization.

28324450565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50248.

The product of its (nonzero) digits is 1152000, while the sum is 44.

The spelling of 28324450565 in words is "twenty-eight billion, three hundred twenty-four million, four hundred fifty thousand, five hundred sixty-five".