563021663 has 4 divisors (see below), whose sum is σ = 563070960. Its totient is φ = 562972368.

The previous prime is 563021653. The next prime is 563021687. The reversal of 563021663 is 366120365.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 563021663 - 2⁴ = 563021647 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 (563021603) 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, 2318 + ... + 33636.

It is an arithmetic number, because the mean of its divisors is an integer number (140767740).

Almost surely, 2^563021663 is an apocalyptic number.

563021663 is a deficient number, since it is larger than the sum of its proper divisors (49297).

563021663 is a wasteful number, since it uses less digits than its factorization.

563021663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49296.

The product of its (nonzero) digits is 19440, while the sum is 32.

The square root of 563021663 is about 23728.0775243171. The cubic root of 563021663 is about 825.7369175671.

The spelling of 563021663 in words is "five hundred sixty-three million, twenty-one thousand, six hundred sixty-three".