198665344512 has 120 divisors (see below), whose sum is σ = 607089029976. Its totient is φ = 62326358016.

The previous prime is 198665344499. The next prime is 198665344517. The reversal of 198665344512 is 215443566891.

198665344512 is a `hidden beast` number, since 1 + 9 + 8 + 66 + 534 + 45 + 1 + 2 = 666.

It is a super-2 number, since 2×198665344512² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198665344517) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1189698 + ... + 1346369.

Almost surely, 2^198665344512 is an apocalyptic number.

198665344512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

198665344512 is an abundant number, since it is smaller than the sum of its proper divisors (408423685464).

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

198665344512 is a wasteful number, since it uses less digits than its factorization.

198665344512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2536108 (or 2536089 counting only the distinct ones).

The product of its digits is 6220800, while the sum is 54.

The spelling of 198665344512 in words is "one hundred ninety-eight billion, six hundred sixty-five million, three hundred forty-four thousand, five hundred twelve".