9999090909999 has 24 divisors (see below), whose sum is σ = 14722451754192. Its totient is φ = 6538377139200.

The previous prime is 9999090909959. The next prime is 9999090910051.

9999090909999 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 9999090909999 - 2⁹ = 9999090909487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9999090909919) 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, 51305074 + ... + 51499599.

It is an arithmetic number, because the mean of its divisors is an integer number (613435489758).

Almost surely, 2^{9999090909999} is an apocalyptic number.

9999090909999 is a deficient number, since it is larger than the sum of its proper divisors (4723360844193).

9999090909999 is a wasteful number, since it uses less digits than its factorization.

9999090909999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102804887 (or 102804884 counting only the distinct ones).

The product of its (nonzero) digits is 3486784401, while the sum is 90.

The spelling of 9999090909999 in words is "nine trillion, nine hundred ninety-nine billion, ninety million, nine hundred nine thousand, nine hundred ninety-nine".