9664747971 has 16 divisors (see below), whose sum is σ = 12950977536. Its totient is φ = 6410873376.

The previous prime is 9664747949. The next prime is 9664747997. The reversal of 9664747971 is 1797474669.

It is not a de Polignac number, because 9664747971 - 2¹³ = 9664739779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9664747471) by changing a digit.

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, 2254396 + ... + 2258678.

It is an arithmetic number, because the mean of its divisors is an integer number (809436096).

Almost surely, 2^9664747971 is an apocalyptic number.

9664747971 is a deficient number, since it is larger than the sum of its proper divisors (3286229565).

9664747971 is a wasteful number, since it uses less digits than its factorization.

9664747971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7882.

The product of its digits is 16003008, while the sum is 60.

The square root of 9664747971 is about 98309.4500594933. The cubic root of 9664747971 is about 2130.0845603318.

The spelling of 9664747971 in words is "nine billion, six hundred sixty-four million, seven hundred forty-seven thousand, nine hundred seventy-one".