198186487121 has 8 divisors (see below), whose sum is σ = 226504666944. Its totient is φ = 169869763440.

The previous prime is 198186487111. The next prime is 198186487181. The reversal of 198186487121 is 121784681891.

198186487121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 198186487121 - 2²⁶ = 198119378257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (198186487111) 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 in 7 ways as a sum of consecutive naturals, for example, 54875 + ... + 631968.

It is an arithmetic number, because the mean of its divisors is an integer number (28313083368).

Almost surely, 2^198186487121 is an apocalyptic number.

It is an amenable number.

198186487121 is a deficient number, since it is larger than the sum of its proper divisors (28318179823).

198186487121 is an equidigital number, since it uses as much as digits as its factorization.

198186487121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 728071.

The product of its digits is 1548288, while the sum is 56.

The spelling of 198186487121 in words is "one hundred ninety-eight billion, one hundred eighty-six million, four hundred eighty-seven thousand, one hundred twenty-one".