9981698636 has 24 divisors (see below), whose sum is σ = 21499044000. Its totient is φ = 3948803712.

The previous prime is 9981698603. The next prime is 9981698641. The reversal of 9981698636 is 6368961899.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13710761 + ... + 13711488.

It is an arithmetic number, because the mean of its divisors is an integer number (895793500).

Almost surely, 2^9981698636 is an apocalyptic number.

It is an amenable number.

9981698636 is an abundant number, since it is smaller than the sum of its proper divisors (11517345364).

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

9981698636 is a wasteful number, since it uses less digits than its factorization.

9981698636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27422273 (or 27422271 counting only the distinct ones).

The product of its digits is 30233088, while the sum is 65.

The square root of 9981698636 is about 99908.4512741540. The cubic root of 9981698636 is about 2153.1195843151.

The spelling of 9981698636 in words is "nine billion, nine hundred eighty-one million, six hundred ninety-eight thousand, six hundred thirty-six".