163503116563 has 2 divisors, whose sum is σ = 163503116564. Its totient is φ = 163503116562.

The previous prime is 163503116501. The next prime is 163503116603. The reversal of 163503116563 is 365611305361.

It is a happy number.

It is an a-pointer prime, because the next prime (163503116603) can be obtained adding 163503116563 to its sum of digits (40).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 163503116563 - 2¹³ = 163503108371 is a prime.

It is not a weakly prime, because it can be changed into another prime (163503116663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81751558281 + 81751558282.

It is an arithmetic number, because the mean of its divisors is an integer number (81751558282).

Almost surely, 2^163503116563 is an apocalyptic number.

163503116563 is a deficient number, since it is larger than the sum of its proper divisors (1).

163503116563 is an equidigital number, since it uses as much as digits as its factorization.

163503116563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145800, while the sum is 40.

The spelling of 163503116563 in words is "one hundred sixty-three billion, five hundred three million, one hundred sixteen thousand, five hundred sixty-three".