5644888389 has 24 divisors (see below), whose sum is σ = 9320642240. Its totient is φ = 3224924928.

The previous prime is 5644888373. The next prime is 5644888411. The reversal of 5644888389 is 9838884465.

It is not a de Polignac number, because 5644888389 - 2⁴ = 5644888373 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5644880389) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 410229 + ... + 423765.

Almost surely, 2^5644888389 is an apocalyptic number.

It is an amenable number.

5644888389 is a deficient number, since it is larger than the sum of its proper divisors (3675753851).

5644888389 is a wasteful number, since it uses less digits than its factorization.

5644888389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20169 (or 20166 counting only the distinct ones).

The product of its digits is 53084160, while the sum is 63.

The square root of 5644888389 is about 75132.4722673226. The cubic root of 5644888389 is about 1780.5402127752.

The spelling of 5644888389 in words is "five billion, six hundred forty-four million, eight hundred eighty-eight thousand, three hundred eighty-nine".