563644870689 has 4 divisors (see below), whose sum is σ = 751526494256. Its totient is φ = 375763247124.

The previous prime is 563644870673. The next prime is 563644870697. The reversal of 563644870689 is 986078446365.

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 not a de Polignac number, because 563644870689 - 2⁴ = 563644870673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (563644870619) 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, 93940811779 + ... + 93940811784.

It is an arithmetic number, because the mean of its divisors is an integer number (187881623564).

Almost surely, 2^563644870689 is an apocalyptic number.

It is an amenable number.

563644870689 is a deficient number, since it is larger than the sum of its proper divisors (187881623567).

563644870689 is a wasteful number, since it uses less digits than its factorization.

563644870689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187881623566.

The product of its (nonzero) digits is 209018880, while the sum is 66.

The spelling of 563644870689 in words is "five hundred sixty-three billion, six hundred forty-four million, eight hundred seventy thousand, six hundred eighty-nine".