5644366641 has 27 divisors (see below), whose sum is σ = 8283613611. Its totient is φ = 3703559184.

The previous prime is 5644366621. The next prime is 5644366667. The reversal of 5644366641 is 1466634465.

The square root of 5644366641 is 75129.

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

It can be written as a sum of positive squares in only one way, i.e., 315950625 + 5328416016 = 17775^2 + 72996^2 .

It is a de Polignac number, because none of the positive numbers 2^k-5644366641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5644366621) 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, 17805415 + ... + 17805731.

Almost surely, 2^5644366641 is an apocalyptic number.

5644366641 is the 75129-th square number.

5644366641 is the 37565-th centered octagonal number.

It is an amenable number.

5644366641 is a deficient number, since it is larger than the sum of its proper divisors (2639246970).

5644366641 is an frugal number, since it uses more digits than its factorization.

5644366641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798 (or 399 counting only the distinct ones).

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

The cubic root of 5644366641 is about 1780.4853535909.

The spelling of 5644366641 in words is "five billion, six hundred forty-four million, three hundred sixty-six thousand, six hundred forty-one".