17723664613 has 2 divisors, whose sum is σ = 17723664614. Its totient is φ = 17723664612.

The previous prime is 17723664593. The next prime is 17723664641. The reversal of 17723664613 is 31646632771.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15982522084 + 1741142529 = 126422^2 + 41727^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-17723664613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17723644613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8861832306 + 8861832307.

It is an arithmetic number, because the mean of its divisors is an integer number (8861832307).

Almost surely, 2^17723664613 is an apocalyptic number.

It is an amenable number.

17723664613 is a deficient number, since it is larger than the sum of its proper divisors (1).

17723664613 is an equidigital number, since it uses as much as digits as its factorization.

17723664613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 762048, while the sum is 46.

The spelling of 17723664613 in words is "seventeen billion, seven hundred twenty-three million, six hundred sixty-four thousand, six hundred thirteen".