198108105230986 has 4 divisors (see below), whose sum is σ = 297162157846482. Its totient is φ = 99054052615492.

The previous prime is 198108105230933. The next prime is 198108105231059. The reversal of 198108105230986 is 689032501801891.

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

It can be written as a sum of positive squares in only one way, i.e., 114032391174025 + 84075714056961 = 10678595^2 + 9169281^2 .

It is a super-2 number, since 2×198108105230986² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

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, 49527026307745 + ... + 49527026307748.

Almost surely, 2^{198108105230986} is an apocalyptic number.

198108105230986 is a deficient number, since it is larger than the sum of its proper divisors (99054052615496).

198108105230986 is an equidigital number, since it uses as much as digits as its factorization.

198108105230986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99054052615495.

The product of its (nonzero) digits is 7464960, while the sum is 61.

The spelling of 198108105230986 in words is "one hundred ninety-eight trillion, one hundred eight billion, one hundred five million, two hundred thirty thousand, nine hundred eighty-six".