16607805217 has 4 divisors (see below), whose sum is σ = 16794409860. Its totient is φ = 16421200576.

The previous prime is 16607805211. The next prime is 16607805229. The reversal of 16607805217 is 71250870661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2028691681 + 14579113536 = 45041^2 + 120744^2 .

It is a cyclic number.

It is not a de Polignac number, because 16607805217 - 2¹⁹ = 16607280929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16607805211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93302188 + ... + 93302365.

It is an arithmetic number, because the mean of its divisors is an integer number (4198602465).

Almost surely, 2^16607805217 is an apocalyptic number.

It is an amenable number.

16607805217 is a deficient number, since it is larger than the sum of its proper divisors (186604643).

16607805217 is an equidigital number, since it uses as much as digits as its factorization.

16607805217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186604642.

The product of its (nonzero) digits is 141120, while the sum is 43.

The spelling of 16607805217 in words is "sixteen billion, six hundred seven million, eight hundred five thousand, two hundred seventeen".