198445646880 has 288 divisors, whose sum is σ = 752815365120. Its totient is φ = 47272273920.

The previous prime is 198445646879. The next prime is 198445646941. The reversal of 198445646880 is 88646544891.

198445646880 is a `hidden beast` number, since 1 + 9 + 8 + 4 + 4 + 564 + 68 + 8 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 409341 + ... + 751299.

It is an arithmetic number, because the mean of its divisors is an integer number (2613942240).

Almost surely, 2^198445646880 is an apocalyptic number.

198445646880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 198445646880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (376407682560).

198445646880 is an abundant number, since it is smaller than the sum of its proper divisors (554369718240).

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

198445646880 is a wasteful number, since it uses less digits than its factorization.

198445646880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342024 (or 342013 counting only the distinct ones).

The product of its (nonzero) digits is 53084160, while the sum is 63.

The spelling of 198445646880 in words is "one hundred ninety-eight billion, four hundred forty-five million, six hundred forty-six thousand, eight hundred eighty".