563399865 has 24 divisors (see below), whose sum is σ = 1116068928. Its totient is φ = 257554080.

The previous prime is 563399861. The next prime is 563399867. The reversal of 563399865 is 568993365.

It is not a de Polignac number, because 563399865 - 2² = 563399861 is a prime.

It is not an unprimeable number, because it can be changed into a prime (563399861) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 893971 + ... + 894600.

It is an arithmetic number, because the mean of its divisors is an integer number (46502872).

Almost surely, 2^563399865 is an apocalyptic number.

It is an amenable number.

563399865 is a deficient number, since it is larger than the sum of its proper divisors (552669063).

563399865 is a wasteful number, since it uses less digits than its factorization.

563399865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1788589 (or 1788586 counting only the distinct ones).

The product of its digits is 5248800, while the sum is 54.

The square root of 563399865 is about 23736.0456900470. The cubic root of 563399865 is about 825.9217686267.

The spelling of 563399865 in words is "five hundred sixty-three million, three hundred ninety-nine thousand, eight hundred sixty-five".