9659744656 has 15 divisors (see below), whose sum is σ = 18716517003. Its totient is φ = 4829675760.

The previous prime is 9659744651. The next prime is 9659744657. The reversal of 9659744656 is 6564479569.

The square root of 9659744656 is 98284.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9659744594 and 9659744603.

It is not an unprimeable number, because it can be changed into a prime (9659744651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 380851 + ... + 405421.

Almost surely, 2^9659744656 is an apocalyptic number.

9659744656 is the 98284-th square number.

It is an amenable number.

9659744656 is a deficient number, since it is larger than the sum of its proper divisors (9056772347).

9659744656 is an frugal number, since it uses more digits than its factorization.

9659744656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49150 (or 24573 counting only the distinct ones).

The product of its digits is 48988800, while the sum is 61.

The cubic root of 9659744656 is about 2129.7169244771.

The spelling of 9659744656 in words is "nine billion, six hundred fifty-nine million, seven hundred forty-four thousand, six hundred fifty-six".