9664856584669 has 24 divisors (see below), whose sum is σ = 12017794024800. Its totient is φ = 7683507599040.

The previous prime is 9664856584667. The next prime is 9664856584679.

9664856584669 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 9664856584669 - 2¹ = 9664856584667 is a prime.

It is a super-2 number, since 2×9664856584669² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9664856584592 and 9664856584601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9664856584661) 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, 136779274 + ... + 136849915.

It is an arithmetic number, because the mean of its divisors is an integer number (500741417700).

Almost surely, 2^{9664856584669} is an apocalyptic number.

It is an amenable number.

9664856584669 is a deficient number, since it is larger than the sum of its proper divisors (2352937440131).

9664856584669 is a wasteful number, since it uses less digits than its factorization.

9664856584669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273629245 (or 273629232 counting only the distinct ones).

The product of its digits is 16124313600, while the sum is 82.

The spelling of 9664856584669 in words is "nine trillion, six hundred sixty-four billion, eight hundred fifty-six million, five hundred eighty-four thousand, six hundred sixty-nine".