16321968833 has 2 divisors, whose sum is σ = 16321968834. Its totient is φ = 16321968832.

The previous prime is 16321968827. The next prime is 16321968907. The reversal of 16321968833 is 33886912361.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10713906064 + 5608062769 = 103508^2 + 74887^2 .

It is a cyclic number.

It is not a de Polignac number, because 16321968833 - 2²⁶ = 16254859969 is a prime.

It is not a weakly prime, because it can be changed into another prime (16321968823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8160984416 + 8160984417.

It is an arithmetic number, because the mean of its divisors is an integer number (8160984417).

Almost surely, 2^16321968833 is an apocalyptic number.

It is an amenable number.

16321968833 is a deficient number, since it is larger than the sum of its proper divisors (1).

16321968833 is an equidigital number, since it uses as much as digits as its factorization.

16321968833 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1119744, while the sum is 50.

The spelling of 16321968833 in words is "sixteen billion, three hundred twenty-one million, nine hundred sixty-eight thousand, eight hundred thirty-three".