9989769540 has 24 divisors (see below), whose sum is σ = 27971354880. Its totient is φ = 2663938528.

The previous prime is 9989769539. The next prime is 9989769563. The reversal of 9989769540 is 459679899.

9989769540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83248020 + ... + 83248139.

It is an arithmetic number, because the mean of its divisors is an integer number (1165473120).

Almost surely, 2^9989769540 is an apocalyptic number.

It is an amenable number.

9989769540 is an abundant number, since it is smaller than the sum of its proper divisors (17981585340).

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

9989769540 is a wasteful number, since it uses less digits than its factorization.

9989769540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166496171 (or 166496169 counting only the distinct ones).

The product of its (nonzero) digits is 44089920, while the sum is 66.

The square root of 9989769540 is about 99948.8346105146. The cubic root of 9989769540 is about 2153.6997440831.

The spelling of 9989769540 in words is "nine billion, nine hundred eighty-nine million, seven hundred sixty-nine thousand, five hundred forty".