28371104165 has 4 divisors (see below), whose sum is σ = 34045325004. Its totient is φ = 22696883328.

The previous prime is 28371104149. The next prime is 28371104189. The reversal of 28371104165 is 56140117382.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16846222849 + 11524881316 = 129793^2 + 107354^2 .

It is a cyclic number.

It is not a de Polignac number, because 28371104165 - 2⁴ = 28371104149 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 (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2837110412 + ... + 2837110421.

It is an arithmetic number, because the mean of its divisors is an integer number (8511331251).

Almost surely, 2^28371104165 is an apocalyptic number.

It is an amenable number.

28371104165 is a deficient number, since it is larger than the sum of its proper divisors (5674220839).

28371104165 is an equidigital number, since it uses as much as digits as its factorization.

28371104165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5674220838.

The product of its (nonzero) digits is 40320, while the sum is 38.

The spelling of 28371104165 in words is "twenty-eight billion, three hundred seventy-one million, one hundred four thousand, one hundred sixty-five".