163020558317 has 2 divisors, whose sum is σ = 163020558318. Its totient is φ = 163020558316.

The previous prime is 163020558247. The next prime is 163020558331. The reversal of 163020558317 is 713855020361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 150595220356 + 12425337961 = 388066^2 + 111469^2 .

It is a cyclic number.

It is not a de Polignac number, because 163020558317 - 2⁸ = 163020558061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (163020518317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81510279158 + 81510279159.

It is an arithmetic number, because the mean of its divisors is an integer number (81510279159).

Almost surely, 2^163020558317 is an apocalyptic number.

It is an amenable number.

163020558317 is a deficient number, since it is larger than the sum of its proper divisors (1).

163020558317 is an equidigital number, since it uses as much as digits as its factorization.

163020558317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 151200, while the sum is 41.

Adding to 163020558317 its reverse (713855020361), we get a palindrome (876875578678).

The spelling of 163020558317 in words is "one hundred sixty-three billion, twenty million, five hundred fifty-eight thousand, three hundred seventeen".