16805690207705 has 48 divisors (see below), whose sum is σ = 23907202525584. Its totient is φ = 11304009400320.

The previous prime is 16805690207701. The next prime is 16805690207707. The reversal of 16805690207705 is 50770209650861.

It can be written as a sum of positive squares in 8 ways, for example, as 4920482222656 + 11885207985049 = 2218216^2 + 3447493^2 .

It is not a de Polignac number, because 16805690207705 - 2² = 16805690207701 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16805690207701) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 60540425 + ... + 60817385.

It is an arithmetic number, because the mean of its divisors is an integer number (498066719283).

Almost surely, 2^{16805690207705} is an apocalyptic number.

It is an amenable number.

16805690207705 is a deficient number, since it is larger than the sum of its proper divisors (7101512317879).

16805690207705 is a wasteful number, since it uses less digits than its factorization.

16805690207705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281706 (or 281699 counting only the distinct ones).

The product of its (nonzero) digits is 6350400, while the sum is 56.

The spelling of 16805690207705 in words is "sixteen trillion, eight hundred five billion, six hundred ninety million, two hundred seven thousand, seven hundred five".