816016563 has 24 divisors (see below), whose sum is σ = 1259949600. Its totient is φ = 507661440.

The previous prime is 816016549. The next prime is 816016603. The reversal of 816016563 is 365610618.

It is a happy number.

816016563 is a `hidden beast` number, since 81 + 6 + 0 + 16 + 563 = 666.

816016563 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 816016563 - 2¹⁰ = 816015539 is a prime.

It is not an unprimeable number, because it can be changed into a prime (816016543) 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, 39588 + ... + 56561.

It is an arithmetic number, because the mean of its divisors is an integer number (52497900).

Almost surely, 2^816016563 is an apocalyptic number.

816016563 is a deficient number, since it is larger than the sum of its proper divisors (443933037).

816016563 is a wasteful number, since it uses less digits than its factorization.

816016563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96219 (or 96216 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 816016563 is about 28566.0036231882. The cubic root of 816016563 is about 934.4720681594.

The spelling of 816016563 in words is "eight hundred sixteen million, sixteen thousand, five hundred sixty-three".