328810716721 has 2 divisors, whose sum is σ = 328810716722. Its totient is φ = 328810716720.

The previous prime is 328810716677. The next prime is 328810716757. The reversal of 328810716721 is 127617018823.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 173189145600 + 155621571121 = 416160^2 + 394489^2 .

It is a cyclic number.

It is not a de Polignac number, because 328810716721 - 2¹³ = 328810708529 is a prime.

It is not a weakly prime, because it can be changed into another prime (328810716761) 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, 164405358360 + 164405358361.

It is an arithmetic number, because the mean of its divisors is an integer number (164405358361).

Almost surely, 2^328810716721 is an apocalyptic number.

It is an amenable number.

328810716721 is a deficient number, since it is larger than the sum of its proper divisors (1).

328810716721 is an equidigital number, since it uses as much as digits as its factorization.

328810716721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 225792, while the sum is 46.

The spelling of 328810716721 in words is "three hundred twenty-eight billion, eight hundred ten million, seven hundred sixteen thousand, seven hundred twenty-one".