9664856147 has 4 divisors (see below), whose sum is σ = 9668010456. Its totient is φ = 9661701840.

The previous prime is 9664856137. The next prime is 9664856161. The reversal of 9664856147 is 7416584669.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9664856147 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9664856092 and 9664856101.

It is not an unprimeable number, because it can be changed into a prime (9664856137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1572554 + ... + 1578687.

It is an arithmetic number, because the mean of its divisors is an integer number (2417002614).

Almost surely, 2^9664856147 is an apocalyptic number.

9664856147 is a deficient number, since it is larger than the sum of its proper divisors (3154309).

9664856147 is a wasteful number, since it uses less digits than its factorization.

9664856147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3154308.

The product of its digits is 8709120, while the sum is 56.

The square root of 9664856147 is about 98310.0002390398. Note that the first 3 decimals coincide. The cubic root of 9664856147 is about 2130.0925075357.

The spelling of 9664856147 in words is "nine billion, six hundred sixty-four million, eight hundred fifty-six thousand, one hundred forty-seven".