198128242244 has 6 divisors (see below), whose sum is σ = 346724423934. Its totient is φ = 99064121120.

The previous prime is 198128242243. The next prime is 198128242261. The reversal of 198128242244 is 442242821891.

It can be written as a sum of positive squares in only one way, i.e., 177704402500 + 20423839744 = 421550^2 + 142912^2 .

It is a super-3 number, since 3×198128242244³ (a number of 35 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (198128242241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24766030277 + ... + 24766030284.

It is an arithmetic number, because the mean of its divisors is an integer number (57787403989).

Almost surely, 2^198128242244 is an apocalyptic number.

It is an amenable number.

198128242244 is a deficient number, since it is larger than the sum of its proper divisors (148596181690).

198128242244 is a wasteful number, since it uses less digits than its factorization.

198128242244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49532060565 (or 49532060563 counting only the distinct ones).

The product of its digits is 589824, while the sum is 47.

The spelling of 198128242244 in words is "one hundred ninety-eight billion, one hundred twenty-eight million, two hundred forty-two thousand, two hundred forty-four".