28144553173 has 12 divisors (see below), whose sum is σ = 30950891244. Its totient is φ = 25573433600.

The previous prime is 28144553161. The next prime is 28144553219. The reversal of 28144553173 is 37135544182.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7827471729 + 20317081444 = 88473^2 + 142538^2 .

It is not a de Polignac number, because 28144553173 - 2⁹ = 28144552661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28144563173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 195915 + ... + 307687.

It is an arithmetic number, because the mean of its divisors is an integer number (2579240937).

Almost surely, 2^28144553173 is an apocalyptic number.

It is an amenable number.

28144553173 is a deficient number, since it is larger than the sum of its proper divisors (2806338071).

28144553173 is a wasteful number, since it uses less digits than its factorization.

28144553173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113876 (or 113865 counting only the distinct ones).

The product of its digits is 403200, while the sum is 43.

The spelling of 28144553173 in words is "twenty-eight billion, one hundred forty-four million, five hundred fifty-three thousand, one hundred seventy-three".