198299214864 has 135 divisors (see below), whose sum is σ = 568827757407. Its totient is φ = 64487723328.

The previous prime is 198299214829. The next prime is 198299214889. The reversal of 198299214864 is 468412992891.

The square root of 198299214864 is 445308.

It is a perfect power (a square), and thus also a powerful number.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 229778497 + ... + 229779359.

Almost surely, 2^198299214864 is an apocalyptic number.

198299214864 is the 445308-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 198299214864

198299214864 is an abundant number, since it is smaller than the sum of its proper divisors (370528542543).

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

198299214864 is an frugal number, since it uses more digits than its factorization.

198299214864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1826 (or 911 counting only the distinct ones).

The product of its digits is 17915904, while the sum is 63.

The spelling of 198299214864 in words is "one hundred ninety-eight billion, two hundred ninety-nine million, two hundred fourteen thousand, eight hundred sixty-four".