9664138648 has 32 divisors (see below), whose sum is σ = 19805074560. Its totient is φ = 4401123840.

The previous prime is 9664138639. The next prime is 9664138697. The reversal of 9664138648 is 8468314669.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1141911 + ... + 1150342.

It is an arithmetic number, because the mean of its divisors is an integer number (618908580).

Almost surely, 2^9664138648 is an apocalyptic number.

It is an amenable number.

9664138648 is an abundant number, since it is smaller than the sum of its proper divisors (10140935912).

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

9664138648 is a wasteful number, since it uses less digits than its factorization.

9664138648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2292307 (or 2292303 counting only the distinct ones).

The product of its digits is 5971968, while the sum is 55.

The square root of 9664138648 is about 98306.3510054157. The cubic root of 9664138648 is about 2130.0397950054.

The spelling of 9664138648 in words is "nine billion, six hundred sixty-four million, one hundred thirty-eight thousand, six hundred forty-eight".