5644000421 has 4 divisors (see below), whose sum is σ = 5644152192. Its totient is φ = 5643848652.

The previous prime is 5644000409. The next prime is 5644000441. The reversal of 5644000421 is 1240004465.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5644000421 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 (5644000441) 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, 21890 + ... + 108476.

It is an arithmetic number, because the mean of its divisors is an integer number (1411038048).

Almost surely, 2^5644000421 is an apocalyptic number.

It is an amenable number.

5644000421 is a deficient number, since it is larger than the sum of its proper divisors (151771).

5644000421 is an equidigital number, since it uses as much as digits as its factorization.

5644000421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151770.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 5644000421 is about 75126.5626859102. The cubic root of 5644000421 is about 1780.4468453761.

Adding to 5644000421 its reverse (1240004465), we get a palindrome (6884004886).

The spelling of 5644000421 in words is "five billion, six hundred forty-four million, four hundred twenty-one", and thus it is an aban number.