99990009999 has 36 divisors (see below), whose sum is σ = 160325646936. Its totient is φ = 59999940000.

The previous prime is 99990009979. The next prime is 99990010007.

99990009999 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 99990009999 - 2²⁸ = 99721574543 is a prime.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99990009949) 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 35 ways as a sum of consecutive naturals, for example, 344557 + ... + 564534.

Almost surely, 2^99990009999 is an apocalyptic number.

99990009999 is a gapful number since it is divisible by the number (99) formed by its first and last digit.

99990009999 is a deficient number, since it is larger than the sum of its proper divisors (60335636937).

99990009999 is a wasteful number, since it uses less digits than its factorization.

99990009999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909220 (or 909206 counting only the distinct ones).

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

The spelling of 99990009999 in words is "ninety-nine billion, nine hundred ninety million, nine thousand, nine hundred ninety-nine".