9664032281 has 2 divisors, whose sum is σ = 9664032282. Its totient is φ = 9664032280.

The previous prime is 9664032269. The next prime is 9664032289. The reversal of 9664032281 is 1822304669.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9173808400 + 490223881 = 95780^2 + 22141^2 .

It is a cyclic number.

It is not a de Polignac number, because 9664032281 - 2¹⁴ = 9664015897 is a prime.

It is a super-2 number, since 2×9664032281² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9664032289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4832016140 + 4832016141.

It is an arithmetic number, because the mean of its divisors is an integer number (4832016141).

Almost surely, 2^9664032281 is an apocalyptic number.

It is an amenable number.

9664032281 is a deficient number, since it is larger than the sum of its proper divisors (1).

9664032281 is an equidigital number, since it uses as much as digits as its factorization.

9664032281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 9664032281 is about 98305.8100063267. The cubic root of 9664032281 is about 2130.0319803144.

The spelling of 9664032281 in words is "nine billion, six hundred sixty-four million, thirty-two thousand, two hundred eighty-one".