9090990990909 has 24 divisors (see below), whose sum is σ = 13162907047680. Its totient is φ = 6046150834752.

The previous prime is 9090990990901. The next prime is 9090990990971.

9090990990909 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 9090990990909 - 2³ = 9090990990901 is a prime.

It is a super-2 number, since 2×9090990990909² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9090990990901) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5560102 + ... + 7006904.

It is an arithmetic number, because the mean of its divisors is an integer number (548454460320).

Almost surely, 2^{9090990990909} is an apocalyptic number.

It is an amenable number.

9090990990909 is a deficient number, since it is larger than the sum of its proper divisors (4071916056771).

9090990990909 is a wasteful number, since it uses less digits than its factorization.

9090990990909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1448481 (or 1448478 counting only the distinct ones).

The product of its (nonzero) digits is 43046721, while the sum is 72.

The spelling of 9090990990909 in words is "nine trillion, ninety billion, nine hundred ninety million, nine hundred ninety thousand, nine hundred nine".