13044440173 has 4 divisors (see below), whose sum is σ = 13173593148. Its totient is φ = 12915287200.

The previous prime is 13044440161. The next prime is 13044440251. The reversal of 13044440173 is 37104444031.

It is a happy number.

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 12738959689 + 305480484 = 112867^2 + 17478^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13044440173 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 (13044440573) 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, 64576336 + ... + 64576537.

It is an arithmetic number, because the mean of its divisors is an integer number (3293398287).

Almost surely, 2^13044440173 is an apocalyptic number.

It is an amenable number.

13044440173 is a deficient number, since it is larger than the sum of its proper divisors (129152975).

13044440173 is a wasteful number, since it uses less digits than its factorization.

13044440173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129152974.

The product of its (nonzero) digits is 16128, while the sum is 31.

The spelling of 13044440173 in words is "thirteen billion, forty-four million, four hundred forty thousand, one hundred seventy-three".