198180181801836 has 108 divisors (see below), whose sum is σ = 555069955367928. Its totient is φ = 59560412341248.

The previous prime is 198180181801817. The next prime is 198180181801883. The reversal of 198180181801836 is 638108181081891.

198180181801836 is a `hidden beast` number, since 1 + 98 + 180 + 18 + 180 + 183 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 378505765 + ... + 379028988.

Almost surely, 2^{198180181801836} is an apocalyptic number.

It is an amenable number.

198180181801836 is an abundant number, since it is smaller than the sum of its proper divisors (356889773566092).

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

198180181801836 is a wasteful number, since it uses less digits than its factorization.

198180181801836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 757534832 (or 757534814 counting only the distinct ones).

The product of its (nonzero) digits is 5308416, while the sum is 63.

The spelling of 198180181801836 in words is "one hundred ninety-eight trillion, one hundred eighty billion, one hundred eighty-one million, eight hundred one thousand, eight hundred thirty-six".