198778691610876 has 96 divisors (see below), whose sum is σ = 504226229866240. Its totient is φ = 60946549530048.

The previous prime is 198778691610871. The next prime is 198778691610883. The reversal of 198778691610876 is 678016196877891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198778691610871) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5860150 + ... + 20782173.

Almost surely, 2^{198778691610876} is an apocalyptic number.

It is an amenable number.

198778691610876 is an abundant number, since it is smaller than the sum of its proper divisors (305447538255364).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

198778691610876 is a wasteful number, since it uses less digits than its factorization.

198778691610876 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26642652 (or 26642624 counting only the distinct ones).

The product of its (nonzero) digits is 3072577536, while the sum is 84.

The spelling of 198778691610876 in words is "one hundred ninety-eight trillion, seven hundred seventy-eight billion, six hundred ninety-one million, six hundred ten thousand, eight hundred seventy-six".