13605406445566 has 32 divisors (see below), whose sum is σ = 22857684474240. Its totient is φ = 6032366286336.

The previous prime is 13605406445503. The next prime is 13605406445593. The reversal of 13605406445566 is 66554460450631.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89435611 + ... + 89587606.

It is an arithmetic number, because the mean of its divisors is an integer number (714302639820).

Almost surely, 2^{13605406445566} is an apocalyptic number.

13605406445566 is a deficient number, since it is larger than the sum of its proper divisors (9252278028674).

13605406445566 is a wasteful number, since it uses less digits than its factorization.

13605406445566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179023348.

The product of its (nonzero) digits is 31104000, while the sum is 55.

The spelling of 13605406445566 in words is "thirteen trillion, six hundred five billion, four hundred six million, four hundred forty-five thousand, five hundred sixty-six".