198223627517 has 2 divisors, whose sum is σ = 198223627518. Its totient is φ = 198223627516.

The previous prime is 198223627499. The next prime is 198223627523. The reversal of 198223627517 is 715726322891.

198223627517 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 150597548761 + 47626078756 = 388069^2 + 218234^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-198223627517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198223627117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99111813758 + 99111813759.

It is an arithmetic number, because the mean of its divisors is an integer number (99111813759).

Almost surely, 2^198223627517 is an apocalyptic number.

It is an amenable number.

198223627517 is a deficient number, since it is larger than the sum of its proper divisors (1).

198223627517 is an equidigital number, since it uses as much as digits as its factorization.

198223627517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2540160, while the sum is 53.

The spelling of 198223627517 in words is "one hundred ninety-eight billion, two hundred twenty-three million, six hundred twenty-seven thousand, five hundred seventeen".