5644520021 has 8 divisors (see below), whose sum is σ = 6658973184. Its totient is φ = 4682090160.

The previous prime is 5644520017. The next prime is 5644520033. The reversal of 5644520021 is 1200254465.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5644520021 - 2² = 5644520017 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 (5644520071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13005590 + ... + 13006023.

It is an arithmetic number, because the mean of its divisors is an integer number (832371648).

Almost surely, 2^5644520021 is an apocalyptic number.

It is an amenable number.

5644520021 is a deficient number, since it is larger than the sum of its proper divisors (1014453163).

5644520021 is a wasteful number, since it uses less digits than its factorization.

5644520021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26011651.

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 5644520021 is about 75130.0207706613. The cubic root of 5644520021 is about 1780.5014810791.

Adding to 5644520021 its reverse (1200254465), we get a palindrome (6844774486).

The spelling of 5644520021 in words is "five billion, six hundred forty-four million, five hundred twenty thousand, twenty-one".