9090909090909 has 24 divisors (see below), whose sum is σ = 13189106736000. Its totient is φ = 6033943056960.

The previous prime is 9090909090847. The next prime is 9090909090911.

9090909090909 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 9090909090909 - 2²⁹ = 9090372219997 is a prime.

It is an alternating number because its digits alternate between odd and even.

9090909090909 is an undulating number in base 10.

9090909090909 is a modest number, since divided by 9090909 gives 90909 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9090909090979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9545454 + ... + 10454544.

It is an arithmetic number, because the mean of its divisors is an integer number (549546114000).

Almost surely, 2^{9090909090909} is an apocalyptic number.

It is an amenable number.

9090909090909 is a deficient number, since it is larger than the sum of its proper divisors (4098197645091).

9090909090909 is a wasteful number, since it uses less digits than its factorization.

9090909090909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 913985 (or 913982 counting only the distinct ones).

The product of its (nonzero) digits is 4782969, while the sum is 63.

It can be divided in two parts, 909090 and 9090909, that added together give a palindrome (9999999).

The spelling of 9090909090909 in words is "nine trillion, ninety billion, nine hundred nine million, ninety thousand, nine hundred nine".