67632716321 has 2 divisors, whose sum is σ = 67632716322. Its totient is φ = 67632716320.

The previous prime is 67632716297. The next prime is 67632716341. The reversal of 67632716321 is 12361723676.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51842280721 + 15790435600 = 227689^2 + 125660^2 .

It is a cyclic number.

It is not a de Polignac number, because 67632716321 - 2³⁰ = 66558974497 is a prime.

It is not a weakly prime, because it can be changed into another prime (67632716341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33816358160 + 33816358161.

It is an arithmetic number, because the mean of its divisors is an integer number (33816358161).

Almost surely, 2^67632716321 is an apocalyptic number.

It is an amenable number.

67632716321 is a deficient number, since it is larger than the sum of its proper divisors (1).

67632716321 is an equidigital number, since it uses as much as digits as its factorization.

67632716321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 381024, while the sum is 44.

The spelling of 67632716321 in words is "sixty-seven billion, six hundred thirty-two million, seven hundred sixteen thousand, three hundred twenty-one".