198818899824 has 20 divisors (see below), whose sum is σ = 513615491336. Its totient is φ = 66272966592.

The previous prime is 198818899801. The next prime is 198818899879. The reversal of 198818899824 is 428998818891.

198818899824 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2071030159 + ... + 2071030254.

Almost surely, 2^198818899824 is an apocalyptic number.

It is an amenable number.

198818899824 is an abundant number, since it is smaller than the sum of its proper divisors (314796591512).

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

198818899824 is a wasteful number, since it uses less digits than its factorization.

198818899824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4142060424 (or 4142060418 counting only the distinct ones).

The product of its digits is 191102976, while the sum is 75.

The spelling of 198818899824 in words is "one hundred ninety-eight billion, eight hundred eighteen million, eight hundred ninety-nine thousand, eight hundred twenty-four".