13040044013 has 8 divisors (see below), whose sum is σ = 13078647096. Its totient is φ = 13001472000.

The previous prime is 13040044001. The next prime is 13040044019. The reversal of 13040044013 is 31044004031.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 9135918724 + 3904125289 = 95582^2 + 62483^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13040044013 - 2⁴ = 13040043997 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 (13040044019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1033523 + ... + 1046063.

It is an arithmetic number, because the mean of its divisors is an integer number (1634830887).

Almost surely, 2^13040044013 is an apocalyptic number.

It is an amenable number.

13040044013 is a deficient number, since it is larger than the sum of its proper divisors (38603083).

13040044013 is a wasteful number, since it uses less digits than its factorization.

13040044013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15535.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 13040044013 its reverse (31044004031), we get a palindrome (44084048044).

The spelling of 13040044013 in words is "thirteen billion, forty million, forty-four thousand, thirteen".