16685369999993 has 2 divisors, whose sum is σ = 16685369999994. Its totient is φ = 16685369999992.

The previous prime is 16685369999983. The next prime is 16685370000053. The reversal of 16685369999993 is 39999996358661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15555554066809 + 1129815933184 = 3944053^2 + 1062928^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16685369999993 is a prime.

It is not a weakly prime, because it can be changed into another prime (16685369999983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8342684999996 + 8342684999997.

It is an arithmetic number, because the mean of its divisors is an integer number (8342684999997).

Almost surely, 2^{16685369999993} is an apocalyptic number.

It is an amenable number.

16685369999993 is a deficient number, since it is larger than the sum of its proper divisors (1).

16685369999993 is an equidigital number, since it uses as much as digits as its factorization.

16685369999993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41324852160, while the sum is 92.

The spelling of 16685369999993 in words is "sixteen trillion, six hundred eighty-five billion, three hundred sixty-nine million, nine hundred ninety-nine thousand, nine hundred ninety-three".