16321968907 has 2 divisors, whose sum is σ = 16321968908. Its totient is φ = 16321968906.

The previous prime is 16321968833. The next prime is 16321968931. The reversal of 16321968907 is 70986912361.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16321968907 - 2⁷ = 16321968779 is a prime.

It is not a weakly prime, because it can be changed into another prime (16321968967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8160984453 + 8160984454.

It is an arithmetic number, because the mean of its divisors is an integer number (8160984454).

Almost surely, 2^16321968907 is an apocalyptic number.

16321968907 is a deficient number, since it is larger than the sum of its proper divisors (1).

16321968907 is an equidigital number, since it uses as much as digits as its factorization.

16321968907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 979776, while the sum is 52.

The spelling of 16321968907 in words is "sixteen billion, three hundred twenty-one million, nine hundred sixty-eight thousand, nine hundred seven".