198432854784 has 144 divisors (see below), whose sum is σ = 597873679200. Its totient is φ = 64896159744.

The previous prime is 198432854771. The next prime is 198432854843. The reversal of 198432854784 is 487458234891.

It is a happy number.

198432854784 is a `hidden beast` number, since 1 + 9 + 8 + 4 + 3 + 2 + 8 + 547 + 84 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

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, 95502 + ... + 637170.

It is an arithmetic number, because the mean of its divisors is an integer number (4151900550).

Almost surely, 2^198432854784 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 198432854784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (298936839600).

198432854784 is an abundant number, since it is smaller than the sum of its proper divisors (399440824416).

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

198432854784 is an equidigital number, since it uses as much as digits as its factorization.

198432854784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541747 (or 541727 counting only the distinct ones).

The product of its digits is 61931520, while the sum is 63.

The spelling of 198432854784 in words is "one hundred ninety-eight billion, four hundred thirty-two million, eight hundred fifty-four thousand, seven hundred eighty-four".