9090910000000 has 128 divisors (see below), whose sum is σ = 22638463529760. Its totient is φ = 3636360000000.

The previous prime is 9090909999989. The next prime is 9090910000063. The reversal of 9090910000000 is 190909.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9545455 + ... + 10454545.

Almost surely, 2^{9090910000000} 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 9090910000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11319231764880).

9090910000000 is an abundant number, since it is smaller than the sum of its proper divisors (13547553529760).

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

9090910000000 is an frugal number, since it uses more digits than its factorization.

9090910000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909140 (or 909098 counting only the distinct ones).

The product of its (nonzero) digits is 729, while the sum is 28.

Adding to 9090910000000 its reverse (190909), we get a palindrome (9090910190909).

The spelling of 9090910000000 in words is "nine trillion, ninety billion, nine hundred ten million", and thus it is an aban number.