5664368644 has 45 divisors (see below), whose sum is σ = 10939015255. Its totient is φ = 2566434200.

The previous prime is 5664368621. The next prime is 5664368659. The reversal of 5664368644 is 4468634665.

The square root of 5664368644 is 75262.

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

It is a Duffinian number.

Its product of digits (9953280) is a multiple of the sum of its prime divisors (324).

It is a junction number, because it is equal to n+sod(n) for n = 5664368591 and 5664368600.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 18213249 + ... + 18213559.

Almost surely, 2^5664368644 is an apocalyptic number.

5664368644 is the 75262-nd square number.

It is an amenable number.

5664368644 is a deficient number, since it is larger than the sum of its proper divisors (5274646611).

5664368644 is an frugal number, since it uses more digits than its factorization.

5664368644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670 (or 324 counting only the distinct ones).

The product of its digits is 9953280, while the sum is 52.

The cubic root of 5664368644 is about 1782.5860491786.

The spelling of 5664368644 in words is "five billion, six hundred sixty-four million, three hundred sixty-eight thousand, six hundred forty-four".