9990999180 has 72 divisors (see below), whose sum is σ = 30347444400. Its totient is φ = 2660625792.

The previous prime is 9990999173. The next prime is 9990999181. The reversal of 9990999180 is 819990999.

It is a super-2 number, since 2×9990999180² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9990999181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 95466 + ... + 170574.

Almost surely, 2^9990999180 is an apocalyptic number.

9990999180 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

9990999180 is an abundant number, since it is smaller than the sum of its proper divisors (20356445220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9990999180 is a wasteful number, since it uses less digits than its factorization.

9990999180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75863 (or 75858 counting only the distinct ones).

The product of its (nonzero) digits is 4251528, while the sum is 63.

The square root of 9990999180 is about 99954.9857685949. The cubic root of 9990999180 is about 2153.7881067055.

The spelling of 9990999180 in words is "nine billion, nine hundred ninety million, nine hundred ninety-nine thousand, one hundred eighty".