9664747972 has 24 divisors (see below), whose sum is σ = 18524413152. Its totient is φ = 4375560000.

The previous prime is 9664747949. The next prime is 9664747997. The reversal of 9664747972 is 2797474669.

It is a super-2 number, since 2×9664747972² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 9664747972.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 426513 + ... + 448600.

It is an arithmetic number, because the mean of its divisors is an integer number (771850548).

Almost surely, 2^9664747972 is an apocalyptic number.

It is an amenable number.

9664747972 is a deficient number, since it is larger than the sum of its proper divisors (8859665180).

9664747972 is a wasteful number, since it uses less digits than its factorization.

9664747972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 875379 (or 875377 counting only the distinct ones).

The product of its digits is 32006016, while the sum is 61.

The square root of 9664747972 is about 98309.4500645792. The cubic root of 9664747972 is about 2130.0845604053.

The spelling of 9664747972 in words is "nine billion, six hundred sixty-four million, seven hundred forty-seven thousand, nine hundred seventy-two".