13239844405440 has 112 divisors (see below), whose sum is σ = 42254312309088. Its totient is φ = 3512331730944.

The previous prime is 13239844405433. The next prime is 13239844405511. The reversal of 13239844405440 is 4450444893231.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35544007 + ... + 35914566.

Almost surely, 2^{13239844405440} is an apocalyptic number.

13239844405440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13239844405440 is an abundant number, since it is smaller than the sum of its proper divisors (29014467903648).

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

13239844405440 is a wasteful number, since it uses less digits than its factorization.

13239844405440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71458786 (or 71458776 counting only the distinct ones).

The product of its (nonzero) digits is 6635520, while the sum is 51.

The spelling of 13239844405440 in words is "thirteen trillion, two hundred thirty-nine billion, eight hundred forty-four million, four hundred five thousand, four hundred forty".