909909909909 has 144 divisors (see below), whose sum is σ = 1782498786432. Its totient is φ = 431956800000.

The previous prime is 909909909907. The next prime is 909909909911.

909909909909 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (909909909907) and next prime (909909909911).

It is not a de Polignac number, because 909909909909 - 2¹ = 909909909907 is a prime.

909909909909 is a modest number, since divided by 909909909 gives 909 as remainder.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (909909909901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 91895859 + ... + 91905759.

Almost surely, 2^909909909909 is an apocalyptic number.

909909909909 is a gapful number since it is divisible by the number (99) formed by its first and last digit.

It is an amenable number.

909909909909 is a deficient number, since it is larger than the sum of its proper divisors (872588876523).

909909909909 is a wasteful number, since it uses less digits than its factorization.

909909909909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10140 (or 10036 counting only the distinct ones).

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

The spelling of 909909909909 in words is "nine hundred nine billion, nine hundred nine million, nine hundred nine thousand, nine hundred nine".