990999999099 has 48 divisors (see below), whose sum is σ = 1576266531840. Its totient is φ = 594958322880.

The previous prime is 990999999097. The next prime is 990999999103.

990999999099 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 990999999099 - 2¹ = 990999999097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (990999999097) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 65245584 + ... + 65260770.

It is an arithmetic number, because the mean of its divisors is an integer number (32838886080).

Almost surely, 2^990999999099 is an apocalyptic number.

990999999099 is a gapful number since it is divisible by the number (99) formed by its first and last digit.

990999999099 is a deficient number, since it is larger than the sum of its proper divisors (585266532741).

990999999099 is a wasteful number, since it uses less digits than its factorization.

990999999099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21360 (or 21357 counting only the distinct ones).

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

The spelling of 990999999099 in words is "nine hundred ninety billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, ninety-nine".