198297085776 has 80 divisors (see below), whose sum is σ = 530790283200. Its totient is φ = 63716373504.

The previous prime is 198297085739. The next prime is 198297085781. The reversal of 198297085776 is 677580792891.

It is a self number, because there is not a number n which added to its sum of digits gives 198297085776.

It is a congruent number.

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, 746580 + ... + 976716.

It is an arithmetic number, because the mean of its divisors is an integer number (6634878540).

Almost surely, 2^198297085776 is an apocalyptic number.

198297085776 is a gapful number since it is divisible by the number (16) 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 198297085776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (265395141600).

198297085776 is an abundant number, since it is smaller than the sum of its proper divisors (332493197424).

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

198297085776 is a wasteful number, since it uses less digits than its factorization.

198297085776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230796 (or 230790 counting only the distinct ones).

The product of its (nonzero) digits is 106686720, while the sum is 69.

The spelling of 198297085776 in words is "one hundred ninety-eight billion, two hundred ninety-seven million, eighty-five thousand, seven hundred seventy-six".