198345570055517 has 2 divisors, whose sum is σ = 198345570055518. Its totient is φ = 198345570055516.

The previous prime is 198345570055469. The next prime is 198345570055553. The reversal of 198345570055517 is 715550075543891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 176747745211801 + 21597824843716 = 13294651^2 + 4647346^2 .

It is a cyclic number.

It is not a de Polignac number, because 198345570055517 - 2⁶ = 198345570055453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198345570075517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99172785027758 + 99172785027759.

It is an arithmetic number, because the mean of its divisors is an integer number (99172785027759).

Almost surely, 2^{198345570055517} is an apocalyptic number.

It is an amenable number.

198345570055517 is a deficient number, since it is larger than the sum of its proper divisors (1).

198345570055517 is an equidigital number, since it uses as much as digits as its factorization.

198345570055517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 132300000, while the sum is 65.

The spelling of 198345570055517 in words is "one hundred ninety-eight trillion, three hundred forty-five billion, five hundred seventy million, fifty-five thousand, five hundred seventeen".