16704143891 has 2 divisors, whose sum is σ = 16704143892. Its totient is φ = 16704143890.

The previous prime is 16704143887. The next prime is 16704143903. The reversal of 16704143891 is 19834140761.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16704143891 - 2² = 16704143887 is a prime.

It is not a weakly prime, because it can be changed into another prime (16704143851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8352071945 + 8352071946.

It is an arithmetic number, because the mean of its divisors is an integer number (8352071946).

Almost surely, 2^16704143891 is an apocalyptic number.

16704143891 is a deficient number, since it is larger than the sum of its proper divisors (1).

16704143891 is an equidigital number, since it uses as much as digits as its factorization.

16704143891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 44.

The spelling of 16704143891 in words is "sixteen billion, seven hundred four million, one hundred forty-three thousand, eight hundred ninety-one".