9868849644 has 24 divisors (see below), whose sum is σ = 23030578368. Its totient is φ = 3289150480.

The previous prime is 9868849643. The next prime is 9868849687. The reversal of 9868849644 is 4469488689.

9868849644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (9868849643) by changing a digit.

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, 36079 + ... + 145049.

It is an arithmetic number, because the mean of its divisors is an integer number (959607432).

Almost surely, 2^9868849644 is an apocalyptic number.

It is an amenable number.

9868849644 is an abundant number, since it is smaller than the sum of its proper divisors (13161728724).

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

9868849644 is a wasteful number, since it uses less digits than its factorization.

9868849644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116525 (or 116523 counting only the distinct ones).

The product of its digits is 95551488, while the sum is 66.

The square root of 9868849644 is about 99342.0839523714. The cubic root of 9868849644 is about 2144.9747168574.

The spelling of 9868849644 in words is "nine billion, eight hundred sixty-eight million, eight hundred forty-nine thousand, six hundred forty-four".