199818397998396 has 96 divisors (see below), whose sum is σ = 522972700544000. Its totient is φ = 65975445950400.

The previous prime is 199818397998389. The next prime is 199818397998497. The reversal of 199818397998396 is 693899793818991.

199818397998396 is a `hidden beast` number, since 1 + 9 + 98 + 1 + 8 + 39 + 7 + 9 + 98 + 396 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 199818397998297 and 199818397998306.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11862640 + ... + 23245623.

Almost surely, 2^{199818397998396} is an apocalyptic number.

It is an amenable number.

199818397998396 is an abundant number, since it is smaller than the sum of its proper divisors (323154302545604).

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

199818397998396 is a wasteful number, since it uses less digits than its factorization.

199818397998396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35108776 (or 35108768 counting only the distinct ones).

The product of its digits is 102852965376, while the sum is 99.

The spelling of 199818397998396 in words is "one hundred ninety-nine trillion, eight hundred eighteen billion, three hundred ninety-seven million, nine hundred ninety-eight thousand, three hundred ninety-six".