28604242165 has 4 divisors (see below), whose sum is σ = 34325090604. Its totient is φ = 22883393728.

The previous prime is 28604242157. The next prime is 28604242181. The reversal of 28604242165 is 56124240682.

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 4418393841 + 24185848324 = 66471^2 + 155518^2 .

It is a cyclic number.

It is not a de Polignac number, because 28604242165 - 2³ = 28604242157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2860424212 + ... + 2860424221.

It is an arithmetic number, because the mean of its divisors is an integer number (8581272651).

Almost surely, 2^28604242165 is an apocalyptic number.

It is an amenable number.

28604242165 is a deficient number, since it is larger than the sum of its proper divisors (5720848439).

28604242165 is an equidigital number, since it uses as much as digits as its factorization.

28604242165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5720848438.

The product of its (nonzero) digits is 184320, while the sum is 40.

The spelling of 28604242165 in words is "twenty-eight billion, six hundred four million, two hundred forty-two thousand, one hundred sixty-five".