198998189548 has 24 divisors (see below), whose sum is σ = 351875727504. Its totient is φ = 98464248000.

The previous prime is 198998189503. The next prime is 198998189591. The reversal of 198998189548 is 845981899891.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155698 + ... + 649798.

It is an arithmetic number, because the mean of its divisors is an integer number (14661488646).

Almost surely, 2^198998189548 is an apocalyptic number.

It is an amenable number.

198998189548 is a deficient number, since it is larger than the sum of its proper divisors (152877537956).

198998189548 is a wasteful number, since it uses less digits than its factorization.

198998189548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495153 (or 495151 counting only the distinct ones).

The product of its digits is 537477120, while the sum is 79.

The spelling of 198998189548 in words is "one hundred ninety-eight billion, nine hundred ninety-eight million, one hundred eighty-nine thousand, five hundred forty-eight".