16723812689 has 2 divisors, whose sum is σ = 16723812690. Its totient is φ = 16723812688.

The previous prime is 16723812653. The next prime is 16723812731. The reversal of 16723812689 is 98621832761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16120619089 + 603193600 = 126967^2 + 24560^2 .

It is a cyclic number.

It is not a de Polignac number, because 16723812689 - 2²⁸ = 16455377233 is a prime.

It is a super-3 number, since 3×16723812689³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16723812689.

It is not a weakly prime, because it can be changed into another prime (16723812619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8361906344 + 8361906345.

It is an arithmetic number, because the mean of its divisors is an integer number (8361906345).

Almost surely, 2^16723812689 is an apocalyptic number.

It is an amenable number.

16723812689 is a deficient number, since it is larger than the sum of its proper divisors (1).

16723812689 is an equidigital number, since it uses as much as digits as its factorization.

16723812689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1741824, while the sum is 53.

The spelling of 16723812689 in words is "sixteen billion, seven hundred twenty-three million, eight hundred twelve thousand, six hundred eighty-nine".