16844693009 has 2 divisors, whose sum is σ = 16844693010. Its totient is φ = 16844693008.

The previous prime is 16844692933. The next prime is 16844693051. The reversal of 16844693009 is 90039644861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11670048784 + 5174644225 = 108028^2 + 71935^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16844693009 is a prime.

It is not a weakly prime, because it can be changed into another prime (16844693059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8422346504 + 8422346505.

It is an arithmetic number, because the mean of its divisors is an integer number (8422346505).

Almost surely, 2^16844693009 is an apocalyptic number.

It is an amenable number.

16844693009 is a deficient number, since it is larger than the sum of its proper divisors (1).

16844693009 is an equidigital number, since it uses as much as digits as its factorization.

16844693009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1119744, while the sum is 50.

The spelling of 16844693009 in words is "sixteen billion, eight hundred forty-four million, six hundred ninety-three thousand, nine".