16723357709 has 2 divisors, whose sum is σ = 16723357710. Its totient is φ = 16723357708.

The previous prime is 16723357667. The next prime is 16723357711. The reversal of 16723357709 is 90775332761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11869448809 + 4853908900 = 108947^2 + 69670^2 .

It is a cyclic number.

It is not a de Polignac number, because 16723357709 - 2²⁰ = 16722309133 is a prime.

Together with 16723357711, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16723357769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8361678854 + 8361678855.

It is an arithmetic number, because the mean of its divisors is an integer number (8361678855).

Almost surely, 2^16723357709 is an apocalyptic number.

It is an amenable number.

16723357709 is a deficient number, since it is larger than the sum of its proper divisors (1).

16723357709 is an equidigital number, since it uses as much as digits as its factorization.

16723357709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1666980, while the sum is 50.

The spelling of 16723357709 in words is "sixteen billion, seven hundred twenty-three million, three hundred fifty-seven thousand, seven hundred nine".