9659845853729 has 24 divisors (see below), whose sum is σ = 9921634642944. Its totient is φ = 9402486350400.

The previous prime is 9659845853687. The next prime is 9659845853759. The reversal of 9659845853729 is 9273585489569.

It is not a de Polignac number, because 9659845853729 - 2⁴⁰ = 8560334225953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9659845853759) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 344598944 + ... + 344626974.

It is an arithmetic number, because the mean of its divisors is an integer number (413401443456).

Almost surely, 2^{9659845853729} is an apocalyptic number.

It is an amenable number.

9659845853729 is a deficient number, since it is larger than the sum of its proper divisors (261788789215).

9659845853729 is a wasteful number, since it uses less digits than its factorization.

9659845853729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28617 (or 28436 counting only the distinct ones).

The product of its digits is 5878656000, while the sum is 80.

The spelling of 9659845853729 in words is "nine trillion, six hundred fifty-nine billion, eight hundred forty-five million, eight hundred fifty-three thousand, seven hundred twenty-nine".