198671221612 has 12 divisors (see below), whose sum is σ = 357071249920. Its totient is φ = 96650864496.

The previous prime is 198671221589. The next prime is 198671221631. The reversal of 198671221612 is 216122176891.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 671186412 + ... + 671186707.

Almost surely, 2^198671221612 is an apocalyptic number.

It is an amenable number.

198671221612 is a deficient number, since it is larger than the sum of its proper divisors (158400028308).

198671221612 is a wasteful number, since it uses less digits than its factorization.

198671221612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1342373160 (or 1342373158 counting only the distinct ones).

The product of its digits is 145152, while the sum is 46.

The spelling of 198671221612 in words is "one hundred ninety-eight billion, six hundred seventy-one million, two hundred twenty-one thousand, six hundred twelve".