198516989446786 has 32 divisors (see below), whose sum is σ = 317767013245440. Its totient is φ = 92686637971200.

The previous prime is 198516989446777. The next prime is 198516989446801. The reversal of 198516989446786 is 687644989615891.

It is a self number, because there is not a number n which added to its sum of digits gives 198516989446786.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15858216 + ... + 25465996.

It is an arithmetic number, because the mean of its divisors is an integer number (9930219163920).

Almost surely, 2^{198516989446786} is an apocalyptic number.

198516989446786 is a deficient number, since it is larger than the sum of its proper divisors (119250023798654).

198516989446786 is a wasteful number, since it uses less digits than its factorization.

198516989446786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9612570.

The product of its digits is 45148078080, while the sum is 91.

The spelling of 198516989446786 in words is "one hundred ninety-eight trillion, five hundred sixteen billion, nine hundred eighty-nine million, four hundred forty-six thousand, seven hundred eighty-six".