909900009909 has 16 divisors (see below), whose sum is σ = 1470545471040. Its totient is φ = 551454551280.

The previous prime is 909900009869. The next prime is 909900009959.

909900009909 is nontrivially palindromic in base 10.

909900009909 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 909900009909 - 2¹⁷ = 909899878837 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (909900009959) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1531817902 + ... + 1531818495.

It is an arithmetic number, because the mean of its divisors is an integer number (91909091940).

Almost surely, 2^909900009909 is an apocalyptic number.

909900009909 is a gapful number since it is divisible by the number (99) formed by its first and last digit.

It is an amenable number.

909900009909 is a deficient number, since it is larger than the sum of its proper divisors (560645461131).

909900009909 is a wasteful number, since it uses less digits than its factorization.

909900009909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3063636417 (or 3063636411 counting only the distinct ones).

The product of its (nonzero) digits is 531441, while the sum is 54.

It can be divided in two parts, 90990000 and 9909, that added together give a palindrome (90999909).

The spelling of 909900009909 in words is "nine hundred nine billion, nine hundred million, nine thousand, nine hundred nine".