198195626138112 has 100 divisors (see below), whose sum is σ = 591561757219026. Its totient is φ = 66065208698880.

The previous prime is 198195626138099. The next prime is 198195626138137. The reversal of 198195626138112 is 211831626591891.

It is a happy number.

198195626138112 is a `hidden beast` number, since 1 + 9 + 8 + 1 + 9 + 5 + 6 + 2 + 613 + 8 + 1 + 1 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 165725869383936 + 32469756754176 = 12873456^2 + 5698224^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 198195626138112.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2389469839 + ... + 2389552782.

Almost surely, 2^{198195626138112} is an apocalyptic number.

198195626138112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

198195626138112 is an abundant number, since it is smaller than the sum of its proper divisors (393366131080914).

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

198195626138112 is an frugal number, since it uses more digits than its factorization.

198195626138112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4779022651 (or 4779022626 counting only the distinct ones).

The product of its digits is 11197440, while the sum is 63.

The spelling of 198195626138112 in words is "one hundred ninety-eight trillion, one hundred ninety-five billion, six hundred twenty-six million, one hundred thirty-eight thousand, one hundred twelve".