9664895640 has 64 divisors (see below), whose sum is σ = 29099460960. Its totient is φ = 2567992320.

The previous prime is 9664895633. The next prime is 9664895767. The reversal of 9664895640 is 465984669.

It is a happy number.

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 15 ways as a sum of consecutive naturals, for example, 112141 + ... + 178620.

Almost surely, 2^9664895640 is an apocalyptic number.

It is an amenable number.

9664895640 is an abundant number, since it is smaller than the sum of its proper divisors (19434565320).

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

9664895640 is a wasteful number, since it uses less digits than its factorization.

9664895640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291052 (or 291048 counting only the distinct ones).

The product of its (nonzero) digits is 11197440, while the sum is 57.

The square root of 9664895640 is about 98310.2010983601. The cubic root of 9664895640 is about 2130.0954088939.

The spelling of 9664895640 in words is "nine billion, six hundred sixty-four million, eight hundred ninety-five thousand, six hundred forty".