198014814817 has 2 divisors, whose sum is σ = 198014814818. Its totient is φ = 198014814816.

The previous prime is 198014814737. The next prime is 198014814847. The reversal of 198014814817 is 718418410891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 193838553441 + 4176261376 = 440271^2 + 64624^2 .

It is a cyclic number.

It is not a de Polignac number, because 198014814817 - 2⁷ = 198014814689 is a prime.

It is not a weakly prime, because it can be changed into another prime (198014814847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99007407408 + 99007407409.

It is an arithmetic number, because the mean of its divisors is an integer number (99007407409).

Almost surely, 2^198014814817 is an apocalyptic number.

It is an amenable number.

198014814817 is a deficient number, since it is larger than the sum of its proper divisors (1).

198014814817 is an equidigital number, since it uses as much as digits as its factorization.

198014814817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 516096, while the sum is 52.

The spelling of 198014814817 in words is "one hundred ninety-eight billion, fourteen million, eight hundred fourteen thousand, eight hundred seventeen".