13644328355329 has 27 divisors (see below), whose sum is σ = 16592786567553. Its totient is φ = 11186166719112.

The previous prime is 13644328355309. The next prime is 13644328355381. The reversal of 13644328355329 is 92355382344631.

The square root of 13644328355329 is 3693823.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 13644328355329 - 2⁹ = 13644328354817 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13644328355309) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 594694032 + ... + 594716974.

Almost surely, 2^{13644328355329} is an apocalyptic number.

13644328355329 is the 3693823-rd square number.

13644328355329 is the 1846912-nd centered octagonal number.

It is an amenable number.

13644328355329 is a deficient number, since it is larger than the sum of its proper divisors (2948458212224).

13644328355329 is an frugal number, since it uses more digits than its factorization.

13644328355329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45946 (or 22973 counting only the distinct ones).

The product of its digits is 55987200, while the sum is 58.

The spelling of 13644328355329 in words is "thirteen trillion, six hundred forty-four billion, three hundred twenty-eight million, three hundred fifty-five thousand, three hundred twenty-nine".