199998180000216 has 320 divisors, whose sum is σ = 609680807366400. Its totient is φ = 60885959565312.

The previous prime is 199998180000211. The next prime is 199998180000233. The reversal of 199998180000216 is 612000081899991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199998180000211) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 541453305 + ... + 541822551.

It is an arithmetic number, because the mean of its divisors is an integer number (1905252523020).

Almost surely, 2^{199998180000216} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 199998180000216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (304840403683200).

199998180000216 is an abundant number, since it is smaller than the sum of its proper divisors (409682627366184).

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

199998180000216 is a wasteful number, since it uses less digits than its factorization.

199998180000216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369960 (or 369947 counting only the distinct ones).

The product of its (nonzero) digits is 5038848, while the sum is 63.

The spelling of 199998180000216 in words is "one hundred ninety-nine trillion, nine hundred ninety-eight billion, one hundred eighty million, two hundred sixteen", and thus it is an aban number.