198011976745668 has 96 divisors (see below), whose sum is σ = 478855844167680. Its totient is φ = 63617332944000.

The previous prime is 198011976745651. The next prime is 198011976745669. The reversal of 198011976745668 is 866547679110891.

It is a junction number, because it is equal to n+sod(n) for n = 198011976745593 and 198011976745602.

It is not an unprimeable number, because it can be changed into a prime (198011976745669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 319006933 + ... + 319627043.

It is an arithmetic number, because the mean of its divisors is an integer number (4988081710080).

Almost surely, 2^{198011976745668} is an apocalyptic number.

It is an amenable number.

198011976745668 is an abundant number, since it is smaller than the sum of its proper divisors (280843867422012).

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

198011976745668 is a wasteful number, since it uses less digits than its factorization.

198011976745668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623609 (or 623607 counting only the distinct ones).

The product of its (nonzero) digits is 1097349120, while the sum is 78.

The spelling of 198011976745668 in words is "one hundred ninety-eight trillion, eleven billion, nine hundred seventy-six million, seven hundred forty-five thousand, six hundred sixty-eight".