5644553021 has 4 divisors (see below), whose sum is σ = 5687641344. Its totient is φ = 5601464700.

The previous prime is 5644553017. The next prime is 5644553063. The reversal of 5644553021 is 1203554465.

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 not a de Polignac number, because 5644553021 - 2² = 5644553017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5644553071) 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, 21543965 + ... + 21544226.

It is an arithmetic number, because the mean of its divisors is an integer number (1421910336).

Almost surely, 2^5644553021 is an apocalyptic number.

It is an amenable number.

5644553021 is a deficient number, since it is larger than the sum of its proper divisors (43088323).

5644553021 is a wasteful number, since it uses less digits than its factorization.

5644553021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43088322.

The product of its (nonzero) digits is 72000, while the sum is 35.

The square root of 5644553021 is about 75130.2403896061. The cubic root of 5644553021 is about 1780.5049509008.

The spelling of 5644553021 in words is "five billion, six hundred forty-four million, five hundred fifty-three thousand, twenty-one".