11279280166 has 32 divisors (see below), whose sum is σ = 21099506688. Its totient is φ = 4393319040.

The previous prime is 11279280149. The next prime is 11279280179. The reversal of 11279280166 is 66108297211.

It is a super-2 number, since 2×11279280166² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 728926 + ... + 744238.

It is an arithmetic number, because the mean of its divisors is an integer number (659359584).

Almost surely, 2^11279280166 is an apocalyptic number.

11279280166 is a deficient number, since it is larger than the sum of its proper divisors (9820226522).

11279280166 is a wasteful number, since it uses less digits than its factorization.

11279280166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20116.

The product of its (nonzero) digits is 72576, while the sum is 43.

The spelling of 11279280166 in words is "eleven billion, two hundred seventy-nine million, two hundred eighty thousand, one hundred sixty-six".