13644643508 has 48 divisors (see below), whose sum is σ = 25699672320. Its totient is φ = 6318342144.

The previous prime is 13644643499. The next prime is 13644643511. The reversal of 13644643508 is 80534644631.

13644643508 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4116860 + ... + 4120172.

It is an arithmetic number, because the mean of its divisors is an integer number (535409840).

Almost surely, 2^13644643508 is an apocalyptic number.

It is an amenable number.

13644643508 is a deficient number, since it is larger than the sum of its proper divisors (12055028812).

13644643508 is a wasteful number, since it uses less digits than its factorization.

13644643508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4536 (or 4534 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 44.

The spelling of 13644643508 in words is "thirteen billion, six hundred forty-four million, six hundred forty-three thousand, five hundred eight".