9090999990909 has 40 divisors (see below), whose sum is σ = 13948996078688. Its totient is φ = 5896198539360.

The previous prime is 9090999990901. The next prime is 9090999990911.

9090999990909 is nontrivially palindromic in base 10.

9090999990909 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9090999990909 - 2³ = 9090999990901 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9090999990901) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 27078894 + ... + 27412560.

Almost surely, 2^{9090999990909} is an apocalyptic number.

It is an amenable number.

9090999990909 is a deficient number, since it is larger than the sum of its proper divisors (4857996087779).

9090999990909 is a wasteful number, since it uses less digits than its factorization.

9090999990909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342807 (or 342798 counting only the distinct ones).

The product of its (nonzero) digits is 387420489, while the sum is 81.

It can be divided in two parts, 9090 and 999990909, that added together give a palindrome (999999999).

The spelling of 9090999990909 in words is "nine trillion, ninety billion, nine hundred ninety-nine million, nine hundred ninety thousand, nine hundred nine".