9964516321 has 2 divisors, whose sum is σ = 9964516322. Its totient is φ = 9964516320.

The previous prime is 9964516307. The next prime is 9964516337. The reversal of 9964516321 is 1236154699.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8093521296 + 1870995025 = 89964^2 + 43255^2 .

It is a cyclic number.

It is not a de Polignac number, because 9964516321 - 2⁹ = 9964515809 is a prime.

It is a super-2 number, since 2×9964516321² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9964516621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4982258160 + 4982258161.

It is an arithmetic number, because the mean of its divisors is an integer number (4982258161).

Almost surely, 2^9964516321 is an apocalyptic number.

It is an amenable number.

9964516321 is a deficient number, since it is larger than the sum of its proper divisors (1).

9964516321 is an equidigital number, since it uses as much as digits as its factorization.

9964516321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 349920, while the sum is 46.

The square root of 9964516321 is about 99822.4239387123. The cubic root of 9964516321 is about 2151.8834277435.

The spelling of 9964516321 in words is "nine billion, nine hundred sixty-four million, five hundred sixteen thousand, three hundred twenty-one".