990990099099 has 96 divisors (see below), whose sum is σ = 1937805961728. Its totient is φ = 475199524800.

The previous prime is 990990099091. The next prime is 990990099133.

990990099099 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 990990099099 - 2³ = 990990099091 is a prime.

It is a super-2 number, since 2×990990099099² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (990990099091) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 635544 + ... + 1544634.

It is an arithmetic number, because the mean of its divisors is an integer number (20185478768).

Almost surely, 2^990990099099 is an apocalyptic number.

990990099099 is a gapful number since it is divisible by the number (99) formed by its first and last digit.

990990099099 is a deficient number, since it is larger than the sum of its proper divisors (946815862629).

990990099099 is a wasteful number, since it uses less digits than its factorization.

990990099099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 909150 (or 909125 counting only the distinct ones).

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

It can be divided in two parts, 9909900 and 99099, that multiplied together give a square (982061180100 = 990990²).

The spelling of 990990099099 in words is "nine hundred ninety billion, nine hundred ninety million, ninety-nine thousand, ninety-nine".