198821225836 has 24 divisors (see below), whose sum is σ = 367356167360. Its totient is φ = 93893936400.

The previous prime is 198821225833. The next prime is 198821225843. The reversal of 198821225836 is 638522128891.

198821225836 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (198821225833) 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, 3926610 + ... + 3976921.

Almost surely, 2^198821225836 is an apocalyptic number.

It is an amenable number.

198821225836 is a deficient number, since it is larger than the sum of its proper divisors (168534941524).

198821225836 is a wasteful number, since it uses less digits than its factorization.

198821225836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7903885 (or 7903883 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 55.

The spelling of 198821225836 in words is "one hundred ninety-eight billion, eight hundred twenty-one million, two hundred twenty-five thousand, eight hundred thirty-six".