9999996563 has 2 divisors, whose sum is σ = 9999996564. Its totient is φ = 9999996562.

The previous prime is 9999996551. The next prime is 9999996569. The reversal of 9999996563 is 3656999999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9999996563 - 2⁶ = 9999996499 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (9999996569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999998281 + 4999998282.

It is an arithmetic number, because the mean of its divisors is an integer number (4999998282).

Almost surely, 2^9999996563 is an apocalyptic number.

9999996563 is a deficient number, since it is larger than the sum of its proper divisors (1).

9999996563 is an equidigital number, since it uses as much as digits as its factorization.

9999996563 is an evil number, because the sum of its binary digits is even.

The product of its digits is 286978140, while the sum is 74.

The square root of 9999996563 is about 99999.9828149985. The cubic root of 9999996563 is about 2154.4344432055.

The spelling of 9999996563 in words is "nine billion, nine hundred ninety-nine million, nine hundred ninety-six thousand, five hundred sixty-three".