9664458544669 has 2 divisors, whose sum is σ = 9664458544670. Its totient is φ = 9664458544668.

The previous prime is 9664458544661. The next prime is 9664458544681.

9664458544669 is nontrivially palindromic in base 10.

9664458544669 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6195310165444 + 3469148379225 = 2489038^2 + 1862565^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 9664458544669 - 2³ = 9664458544661 is a prime.

It is a super-2 number, since 2×9664458544669² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 9664458544595 and 9664458544604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9664458544661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4832229272334 + 4832229272335.

It is an arithmetic number, because the mean of its divisors is an integer number (4832229272335).

Almost surely, 2^{9664458544669} is an apocalyptic number.

It is an amenable number.

9664458544669 is a deficient number, since it is larger than the sum of its proper divisors (1).

9664458544669 is an equidigital number, since it uses as much as digits as its factorization.

9664458544669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5374771200, while the sum is 76.

The spelling of 9664458544669 in words is "nine trillion, six hundred sixty-four billion, four hundred fifty-eight million, five hundred forty-four thousand, six hundred sixty-nine".