16442371023809 has 2 divisors, whose sum is σ = 16442371023810. Its totient is φ = 16442371023808.

The previous prime is 16442371023737. The next prime is 16442371023817. The reversal of 16442371023809 is 90832017324461.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15089557782784 + 1352813241025 = 3884528^2 + 1163105^2 .

It is a cyclic number.

It is not a de Polignac number, because 16442371023809 - 2³² = 16438076056513 is a prime.

It is a super-3 number, since 3×16442371023809³ (a number of 41 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (16442371023829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8221185511904 + 8221185511905.

It is an arithmetic number, because the mean of its divisors is an integer number (8221185511905).

Almost surely, 2^{16442371023809} is an apocalyptic number.

It is an amenable number.

16442371023809 is a deficient number, since it is larger than the sum of its proper divisors (1).

16442371023809 is an equidigital number, since it uses as much as digits as its factorization.

16442371023809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1741824, while the sum is 50.

The spelling of 16442371023809 in words is "sixteen trillion, four hundred forty-two billion, three hundred seventy-one million, twenty-three thousand, eight hundred nine".