The square root of 9000000000000 is 3000000.
It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.
It is a Duffinian number.
It is a nialpdrome in base 10.
It is an unprimeable number.
Almost surely, 29000000000000 is an apocalyptic number.
9000000000000 is a gapful number since it is divisible by the number (90) formed by its first and last digit.
9000000000000 is the 3000000-th square number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 9000000000000
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
9000000000000 is an frugal number, since it uses more digits than its factorization.
9000000000000 is an evil number, because the sum of its binary digits is even.