11557523305866 has 16 divisors (see below), whose sum is σ = 23119650345888. Its totient is φ = 3851740479600.

The previous prime is 11557523305849. The next prime is 11557523305901. The reversal of 11557523305866 is 66850332575511.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191789620 + ... + 191849871.

It is an arithmetic number, because the mean of its divisors is an integer number (1444978146618).

Almost surely, 2^{11557523305866} is an apocalyptic number.

11557523305866 is an abundant number, since it is smaller than the sum of its proper divisors (11562127040022).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11557523305866 is a wasteful number, since it uses less digits than its factorization.

11557523305866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383644517.

The product of its (nonzero) digits is 22680000, while the sum is 57.

The spelling of 11557523305866 in words is "eleven trillion, five hundred fifty-seven billion, five hundred twenty-three million, three hundred five thousand, eight hundred sixty-six".