563641665 has 16 divisors (see below), whose sum is σ = 914530176. Its totient is φ = 296374400.

The previous prime is 563641649. The next prime is 563641693. The reversal of 563641665 is 566146365.

It is not a de Polignac number, because 563641665 - 2⁴ = 563641649 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 263556 + ... + 265685.

It is an arithmetic number, because the mean of its divisors is an integer number (57158136).

Almost surely, 2^563641665 is an apocalyptic number.

It is an amenable number.

563641665 is a deficient number, since it is larger than the sum of its proper divisors (350888511).

563641665 is a wasteful number, since it uses less digits than its factorization.

563641665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529320.

The product of its digits is 388800, while the sum is 42.

The square root of 563641665 is about 23741.1386626674. The cubic root of 563641665 is about 826.0399081180.

Adding to 563641665 its product of digits (388800), we get a palindrome (564030465).

The spelling of 563641665 in words is "five hundred sixty-three million, six hundred forty-one thousand, six hundred sixty-five".