2644416563 has 4 divisors (see below), whose sum is σ = 2645065800. Its totient is φ = 2643767328.

The previous prime is 2644416553. The next prime is 2644416581. The reversal of 2644416563 is 3656144462.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2644416563 - 2⁴ = 2644416547 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2644416563.

It is not an unprimeable number, because it can be changed into a prime (2644416553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 318470 + ... + 326667.

It is an arithmetic number, because the mean of its divisors is an integer number (661266450).

Almost surely, 2^2644416563 is an apocalyptic number.

2644416563 is a deficient number, since it is larger than the sum of its proper divisors (649237).

2644416563 is an equidigital number, since it uses as much as digits as its factorization.

2644416563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649236.

The product of its digits is 414720, while the sum is 41.

The square root of 2644416563 is about 51423.8909749155. The cubic root of 2644416563 is about 1382.8549317546.

The spelling of 2644416563 in words is "two billion, six hundred forty-four million, four hundred sixteen thousand, five hundred sixty-three".