198486315871 has 2 divisors, whose sum is σ = 198486315872. Its totient is φ = 198486315870.

The previous prime is 198486315827. The next prime is 198486315941. The reversal of 198486315871 is 178513684891.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 198486315871 - 2⁹ = 198486315359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198486115871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99243157935 + 99243157936.

It is an arithmetic number, because the mean of its divisors is an integer number (99243157936).

Almost surely, 2^198486315871 is an apocalyptic number.

198486315871 is a deficient number, since it is larger than the sum of its proper divisors (1).

198486315871 is an equidigital number, since it uses as much as digits as its factorization.

198486315871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11612160, while the sum is 61.

The spelling of 198486315871 in words is "one hundred ninety-eight billion, four hundred eighty-six million, three hundred fifteen thousand, eight hundred seventy-one".