13604242165 has 4 divisors (see below), whose sum is σ = 16325090604. Its totient is φ = 10883393728.

The previous prime is 13604242153. The next prime is 13604242181. The reversal of 13604242165 is 56124240631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56124240631 = 47351 ⋅1185281.

It can be written as a sum of positive squares in 2 ways, for example, as 7375717924 + 6228524241 = 85882^2 + 78921^2 .

It is a cyclic number.

It is not a de Polignac number, because 13604242165 - 2⁵ = 13604242133 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13604242165.

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, 1360424212 + ... + 1360424221.

It is an arithmetic number, because the mean of its divisors is an integer number (4081272651).

Almost surely, 2^13604242165 is an apocalyptic number.

It is an amenable number.

13604242165 is a deficient number, since it is larger than the sum of its proper divisors (2720848439).

13604242165 is an equidigital number, since it uses as much as digits as its factorization.

13604242165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2720848438.

The product of its (nonzero) digits is 34560, while the sum is 34.

Adding to 13604242165 its reverse (56124240631), we get a palindrome (69728482796).

The spelling of 13604242165 in words is "thirteen billion, six hundred four million, two hundred forty-two thousand, one hundred sixty-five".