5664431204021 has 4 divisors (see below), whose sum is σ = 5664632906592. Its totient is φ = 5664229501452.

The previous prime is 5664431203987. The next prime is 5664431204039. The reversal of 5664431204021 is 1204021344665.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5664431204021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5664431201021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100809155 + ... + 100865328.

It is an arithmetic number, because the mean of its divisors is an integer number (1416158226648).

Almost surely, 2^{5664431204021} is an apocalyptic number.

It is an amenable number.

5664431204021 is a deficient number, since it is larger than the sum of its proper divisors (201702571).

5664431204021 is a wasteful number, since it uses less digits than its factorization.

5664431204021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201702570.

The product of its (nonzero) digits is 138240, while the sum is 38.

Adding to 5664431204021 its reverse (1204021344665), we get a palindrome (6868452548686).

The spelling of 5664431204021 in words is "five trillion, six hundred sixty-four billion, four hundred thirty-one million, two hundred four thousand, twenty-one".