198196644442 has 32 divisors (see below), whose sum is σ = 308094973632. Its totient is φ = 95550274944.

The previous prime is 198196644419. The next prime is 198196644449. The reversal of 198196644442 is 244446691891.

It is a happy number.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (198196644449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4161838 + ... + 4209190.

It is an arithmetic number, because the mean of its divisors is an integer number (9627967926).

Almost surely, 2^198196644442 is an apocalyptic number.

198196644442 is a deficient number, since it is larger than the sum of its proper divisors (109898329190).

198196644442 is a wasteful number, since it uses less digits than its factorization.

198196644442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47902.

The product of its digits is 11943936, while the sum is 58.

The spelling of 198196644442 in words is "one hundred ninety-eight billion, one hundred ninety-six million, six hundred forty-four thousand, four hundred forty-two".