13329644544 has 66 divisors (see below), whose sum is σ = 38489085960. Its totient is φ = 4443211776.

The previous prime is 13329644539. The next prime is 13329644557. The reversal of 13329644544 is 44544692331.

13329644544 is a `hidden beast` number, since 13 + 3 + 2 + 96 + 4 + 4 + 544 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 13329644544.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 713964 + ... + 732395.

Almost surely, 2^13329644544 is an apocalyptic number.

It is an amenable number.

13329644544 is an abundant number, since it is smaller than the sum of its proper divisors (25159441416).

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

13329644544 is a wasteful number, since it uses less digits than its factorization.

13329644544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1446385 (or 1446364 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 45.

The spelling of 13329644544 in words is "thirteen billion, three hundred twenty-nine million, six hundred forty-four thousand, five hundred forty-four".