9869743644 has 24 divisors (see below), whose sum is σ = 23288161680. Its totient is φ = 3252948864.

The previous prime is 9869743643. The next prime is 9869743651. The reversal of 9869743644 is 4463479689.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9869743643) 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 7 ways as a sum of consecutive naturals, for example, 4619599 + ... + 4621734.

It is an arithmetic number, because the mean of its divisors is an integer number (970340070).

Almost surely, 2^9869743644 is an apocalyptic number.

It is an amenable number.

9869743644 is an abundant number, since it is smaller than the sum of its proper divisors (13418418036).

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

9869743644 is a wasteful number, since it uses less digits than its factorization.

9869743644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9241429 (or 9241427 counting only the distinct ones).

The product of its digits is 31352832, while the sum is 60.

The square root of 9869743644 is about 99346.5834540876. The cubic root of 9869743644 is about 2145.0394846052.

The spelling of 9869743644 in words is "nine billion, eight hundred sixty-nine million, seven hundred forty-three thousand, six hundred forty-four".