180018000198000 has 120 divisors (see below), whose sum is σ = 628742868754416. Its totient is φ = 48004800048000.

The previous prime is 180018000197999. The next prime is 180018000198007. The reversal of 180018000198000 is 891000810081.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180018000198007) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5000482006 + ... + 5000518005.

Almost surely, 2^{180018000198000} is an apocalyptic number.

180018000198000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

180018000198000 is an abundant number, since it is smaller than the sum of its proper divisors (448724868556416).

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

180018000198000 is a wasteful number, since it uses less digits than its factorization.

180018000198000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10001000040 (or 10001000021 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 36.

The spelling of 180018000198000 in words is "one hundred eighty trillion, eighteen billion, one hundred ninety-eight thousand".