13605255173 has 4 divisors (see below), whose sum is σ = 13674317580. Its totient is φ = 13536192768.

The previous prime is 13605255151. The next prime is 13605255217. The reversal of 13605255173 is 37155250631.

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 9773892769 + 3831362404 = 98863^2 + 61898^2 .

It is a cyclic number.

It is not a de Polignac number, because 13605255173 - 2⁸ = 13605254917 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 (13605255073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34530908 + ... + 34531301.

It is an arithmetic number, because the mean of its divisors is an integer number (3418579395).

Almost surely, 2^13605255173 is an apocalyptic number.

It is an amenable number.

13605255173 is a deficient number, since it is larger than the sum of its proper divisors (69062407).

13605255173 is an equidigital number, since it uses as much as digits as its factorization.

13605255173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69062406.

The product of its (nonzero) digits is 94500, while the sum is 38.

The spelling of 13605255173 in words is "thirteen billion, six hundred five million, two hundred fifty-five thousand, one hundred seventy-three".