198109802000 has 80 divisors (see below), whose sum is σ = 522577695744. Its totient is φ = 72039920000.

The previous prime is 198109801999. The next prime is 198109802003. The reversal of 198109802000 is 208901891.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (198109802003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4480496 + ... + 4524495.

Almost surely, 2^198109802000 is an apocalyptic number.

198109802000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198109802000 is an abundant number, since it is smaller than the sum of its proper divisors (324467893744).

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

198109802000 is a wasteful number, since it uses less digits than its factorization.

198109802000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9005025 (or 9005009 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 38.

The spelling of 198109802000 in words is "one hundred ninety-eight billion, one hundred nine million, eight hundred two thousand".