15999716194243 has 2 divisors, whose sum is σ = 15999716194244. Its totient is φ = 15999716194242.

The previous prime is 15999716194237. The next prime is 15999716194307. The reversal of 15999716194243 is 34249161799951.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 15999716194243 - 2²¹ = 15999714097091 is a prime.

It is not a weakly prime, because it can be changed into another prime (15999716194543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7999858097121 + 7999858097122.

It is an arithmetic number, because the mean of its divisors is an integer number (7999858097122).

Almost surely, 2^{15999716194243} is an apocalyptic number.

15999716194243 is a deficient number, since it is larger than the sum of its proper divisors (1).

15999716194243 is an equidigital number, since it uses as much as digits as its factorization.

15999716194243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 132269760, while the sum is 70.

The spelling of 15999716194243 in words is "fifteen trillion, nine hundred ninety-nine billion, seven hundred sixteen million, one hundred ninety-four thousand, two hundred forty-three".