198816891700 has 36 divisors (see below), whose sum is σ = 493065893152. Its totient is φ = 68165791200.

The previous prime is 198816891677. The next prime is 198816891703. The reversal of 198816891700 is 7198618891.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198816891703) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 142011366 + ... + 142012765.

Almost surely, 2^198816891700 is an apocalyptic number.

198816891700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198816891700 is an abundant number, since it is smaller than the sum of its proper divisors (294249001452).

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

198816891700 is a wasteful number, since it uses less digits than its factorization.

198816891700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284024152 (or 284024145 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 58.

The spelling of 198816891700 in words is "one hundred ninety-eight billion, eight hundred sixteen million, eight hundred ninety-one thousand, seven hundred".