5664044391 has 4 divisors (see below), whose sum is σ = 7552059192. Its totient is φ = 3776029592.

The previous prime is 5664044389. The next prime is 5664044413. The reversal of 5664044391 is 1934404665.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 5664044391 - 2¹ = 5664044389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5664044341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 944007396 + ... + 944007401.

It is an arithmetic number, because the mean of its divisors is an integer number (1888014798).

Almost surely, 2^5664044391 is an apocalyptic number.

5664044391 is a deficient number, since it is larger than the sum of its proper divisors (1888014801).

5664044391 is a wasteful number, since it uses less digits than its factorization.

5664044391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1888014800.

The product of its (nonzero) digits is 311040, while the sum is 42.

The square root of 5664044391 is about 75259.8458077081. The cubic root of 5664044391 is about 1782.5520342136.

The spelling of 5664044391 in words is "five billion, six hundred sixty-four million, forty-four thousand, three hundred ninety-one".