16805986703837 has 2 divisors, whose sum is σ = 16805986703838. Its totient is φ = 16805986703836.

The previous prime is 16805986703833. The next prime is 16805986703851. The reversal of 16805986703837 is 73830768950861.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13313894690041 + 3492092013796 = 3648821^2 + 1868714^2 .

It is a cyclic number.

It is not a de Polignac number, because 16805986703837 - 2² = 16805986703833 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16805986703833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8402993351918 + 8402993351919.

It is an arithmetic number, because the mean of its divisors is an integer number (8402993351919).

Almost surely, 2^{16805986703837} is an apocalyptic number.

It is an amenable number.

16805986703837 is a deficient number, since it is larger than the sum of its proper divisors (1).

16805986703837 is an equidigital number, since it uses as much as digits as its factorization.

16805986703837 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 365783040, while the sum is 71.

The spelling of 16805986703837 in words is "sixteen trillion, eight hundred five billion, nine hundred eighty-six million, seven hundred three thousand, eight hundred thirty-seven".