It is a nialpdrome in base 10.
It is an unprimeable number.
Almost surely, 299999985000000 is an apocalyptic number.
99999985000000 is the 5000000-th decagonal number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 99999985000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126711941241600).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
99999985000000 is an frugal number, since it uses more digits than its factorization.
99999985000000 is an evil number, because the sum of its binary digits is even.
The spelling of 99999985000000 in words is "ninety-nine trillion, nine hundred ninety-nine billion, nine hundred eighty-five million", and thus it is an aban number.