163503221205473 has 2 divisors, whose sum is σ = 163503221205474. Its totient is φ = 163503221205472.

The previous prime is 163503221205383. The next prime is 163503221205529. The reversal of 163503221205473 is 374502122305361.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117846483026944 + 45656738178529 = 10855712^2 + 6756977^2 .

It is a cyclic number.

It is not a de Polignac number, because 163503221205473 - 2¹⁴ = 163503221189089 is a prime.

It is not a weakly prime, because it can be changed into another prime (163503221204473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81751610602736 + 81751610602737.

It is an arithmetic number, because the mean of its divisors is an integer number (81751610602737).

Almost surely, 2^{163503221205473} is an apocalyptic number.

It is an amenable number.

163503221205473 is a deficient number, since it is larger than the sum of its proper divisors (1).

163503221205473 is an equidigital number, since it uses as much as digits as its factorization.

163503221205473 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 907200, while the sum is 44.

The spelling of 163503221205473 in words is "one hundred sixty-three trillion, five hundred three billion, two hundred twenty-one million, two hundred five thousand, four hundred seventy-three".