5644640501 has 4 divisors (see below), whose sum is σ = 5653940352. Its totient is φ = 5635340652.

The previous prime is 5644640483. The next prime is 5644640557. The reversal of 5644640501 is 1050464465.

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 5644640501 - 2¹⁰ = 5644639477 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 (5644640201) 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, 4649015 + ... + 4650228.

It is an arithmetic number, because the mean of its divisors is an integer number (1413485088).

Almost surely, 2^5644640501 is an apocalyptic number.

It is an amenable number.

5644640501 is a deficient number, since it is larger than the sum of its proper divisors (9299851).

5644640501 is an equidigital number, since it uses as much as digits as its factorization.

5644640501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9299850.

The product of its (nonzero) digits is 57600, while the sum is 35.

The square root of 5644640501 is about 75130.8225763568. The cubic root of 5644640501 is about 1780.5141490173.

The spelling of 5644640501 in words is "five billion, six hundred forty-four million, six hundred forty thousand, five hundred one".