16243116709 has 2 divisors, whose sum is σ = 16243116710. Its totient is φ = 16243116708.

The previous prime is 16243116707. The next prime is 16243116713. The reversal of 16243116709 is 90761134261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12085704225 + 4157412484 = 109935^2 + 64478^2 .

It is a cyclic number.

It is not a de Polignac number, because 16243116709 - 2¹ = 16243116707 is a prime.

Together with 16243116707, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16243116707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8121558354 + 8121558355.

It is an arithmetic number, because the mean of its divisors is an integer number (8121558355).

Almost surely, 2^16243116709 is an apocalyptic number.

It is an amenable number.

16243116709 is a deficient number, since it is larger than the sum of its proper divisors (1).

16243116709 is an equidigital number, since it uses as much as digits as its factorization.

16243116709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 40.

The spelling of 16243116709 in words is "sixteen billion, two hundred forty-three million, one hundred sixteen thousand, seven hundred nine".