13181344040 has 32 divisors (see below), whose sum is σ = 29661732360. Its totient is φ = 5271878400.

The previous prime is 13181344039. The next prime is 13181344081. The reversal of 13181344040 is 4044318131.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7690237636 + 5491106404 = 87694^2 + 74102^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13181343994 and 13181344012.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 419270 + ... + 449610.

Almost surely, 2^13181344040 is an apocalyptic number.

13181344040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13181344040 is an abundant number, since it is smaller than the sum of its proper divisors (16480388320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13181344040 is a wasteful number, since it uses less digits than its factorization.

13181344040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41213 (or 41209 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The spelling of 13181344040 in words is "thirteen billion, one hundred eighty-one million, three hundred forty-four thousand, forty".