9988361218 has 32 divisors (see below), whose sum is σ = 17440568640. Its totient is φ = 4242274560.

The previous prime is 9988361209. The next prime is 9988361219. The reversal of 9988361218 is 8121638899.

It is not an unprimeable number, because it can be changed into a prime (9988361219) 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 15 ways as a sum of consecutive naturals, for example, 133155 + ... + 194182.

It is an arithmetic number, because the mean of its divisors is an integer number (545017770).

Almost surely, 2^9988361218 is an apocalyptic number.

9988361218 is a deficient number, since it is larger than the sum of its proper divisors (7452207422).

9988361218 is a wasteful number, since it uses less digits than its factorization.

9988361218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327442.

The product of its digits is 1492992, while the sum is 55.

The square root of 9988361218 is about 99941.7891474832. The cubic root of 9988361218 is about 2153.5985323630.

The spelling of 9988361218 in words is "nine billion, nine hundred eighty-eight million, three hundred sixty-one thousand, two hundred eighteen".