11685121107566 has 16 divisors (see below), whose sum is σ = 17585584558080. Its totient is φ = 5823261340920.

The previous prime is 11685121107553. The next prime is 11685121107619. The reversal of 11685121107566 is 66570112158611.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 13259795 + ... + 14113553.

It is an arithmetic number, because the mean of its divisors is an integer number (1099099034880).

Almost surely, 2^{11685121107566} is an apocalyptic number.

11685121107566 is a deficient number, since it is larger than the sum of its proper divisors (5900463450514).

11685121107566 is a wasteful number, since it uses less digits than its factorization.

11685121107566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876359.

The product of its (nonzero) digits is 604800, while the sum is 50.

The spelling of 11685121107566 in words is "eleven trillion, six hundred eighty-five billion, one hundred twenty-one million, one hundred seven thousand, five hundred sixty-six".