16591471685605 has 32 divisors (see below), whose sum is σ = 20990680558848. Its totient is φ = 12573545241600.

The previous prime is 16591471685603. The next prime is 16591471685609. The reversal of 16591471685605 is 50658617419561.

It is not a de Polignac number, because 16591471685605 - 2¹ = 16591471685603 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16591471685603) 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 31 ways as a sum of consecutive naturals, for example, 879156 + ... + 5827165.

It is an arithmetic number, because the mean of its divisors is an integer number (655958767464).

Almost surely, 2^{16591471685605} is an apocalyptic number.

It is an amenable number.

16591471685605 is a deficient number, since it is larger than the sum of its proper divisors (4399208873243).

16591471685605 is a wasteful number, since it uses less digits than its factorization.

16591471685605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6706717.

The product of its (nonzero) digits is 54432000, while the sum is 64.

The spelling of 16591471685605 in words is "sixteen trillion, five hundred ninety-one billion, four hundred seventy-one million, six hundred eighty-five thousand, six hundred five".