9638144868 has 48 divisors (see below), whose sum is σ = 24542167104. Its totient is φ = 2919613440.

The previous prime is 9638144863. The next prime is 9638144881. The reversal of 9638144868 is 8684418369.

It is not an unprimeable number, because it can be changed into a prime (9638144861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 413296 + ... + 435992.

It is an arithmetic number, because the mean of its divisors is an integer number (511295148).

Almost surely, 2^9638144868 is an apocalyptic number.

It is an amenable number.

9638144868 is an abundant number, since it is smaller than the sum of its proper divisors (14904022236).

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

9638144868 is a wasteful number, since it uses less digits than its factorization.

9638144868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25932 (or 25930 counting only the distinct ones).

The product of its digits is 7962624, while the sum is 57.

The square root of 9638144868 is about 98174.0539450215. The cubic root of 9638144868 is about 2128.1283468035.

The spelling of 9638144868 in words is "nine billion, six hundred thirty-eight million, one hundred forty-four thousand, eight hundred sixty-eight".