16324766321 has 2 divisors, whose sum is σ = 16324766322. Its totient is φ = 16324766320.

The previous prime is 16324766267. The next prime is 16324766323. The reversal of 16324766321 is 12366742361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16200198400 + 124567921 = 127280^2 + 11161^2 .

It is a cyclic number.

It is not a de Polignac number, because 16324766321 - 2⁶ = 16324766257 is a prime.

Together with 16324766323, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (16324766323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8162383160 + 8162383161.

It is an arithmetic number, because the mean of its divisors is an integer number (8162383161).

Almost surely, 2^16324766321 is an apocalyptic number.

It is an amenable number.

16324766321 is a deficient number, since it is larger than the sum of its proper divisors (1).

16324766321 is an equidigital number, since it uses as much as digits as its factorization.

16324766321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 41.

The spelling of 16324766321 in words is "sixteen billion, three hundred twenty-four million, seven hundred sixty-six thousand, three hundred twenty-one".