198368217936871 has 4 divisors (see below), whose sum is σ = 203729521124392. Its totient is φ = 193006914749352.

The previous prime is 198368217936841. The next prime is 198368217936883. The reversal of 198368217936871 is 178639712863891.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 198368217936871 - 2²⁵ = 198368184382439 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 198368217936791 and 198368217936800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198368217936841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2680651593705 + ... + 2680651593778.

It is an arithmetic number, because the mean of its divisors is an integer number (50932380281098).

Almost surely, 2^{198368217936871} is an apocalyptic number.

198368217936871 is a deficient number, since it is larger than the sum of its proper divisors (5361303187521).

198368217936871 is an equidigital number, since it uses as much as digits as its factorization.

198368217936871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5361303187520.

The product of its digits is 1316818944, while the sum is 79.

The spelling of 198368217936871 in words is "one hundred ninety-eight trillion, three hundred sixty-eight billion, two hundred seventeen million, nine hundred thirty-six thousand, eight hundred seventy-one".