5644545621 has 32 divisors (see below), whose sum is σ = 9226248192. Its totient is φ = 3020487360.

The previous prime is 5644545601. The next prime is 5644545637. The reversal of 5644545621 is 1265454465.

It is not a de Polignac number, because 5644545621 - 2⁵ = 5644545589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5644545601) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 276165 + ... + 295898.

It is an arithmetic number, because the mean of its divisors is an integer number (288320256).

Almost surely, 2^5644545621 is an apocalyptic number.

It is an amenable number.

5644545621 is a deficient number, since it is larger than the sum of its proper divisors (3581702571).

5644545621 is a wasteful number, since it uses less digits than its factorization.

5644545621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572113.

The product of its digits is 576000, while the sum is 42.

The square root of 5644545621 is about 75130.1911417774. The cubic root of 5644545621 is about 1780.5041728208.

It can be divided in two parts, 564454 and 5621, that added together give a palindrome (570075).

The spelling of 5644545621 in words is "five billion, six hundred forty-four million, five hundred forty-five thousand, six hundred twenty-one".