11161265556 has 48 divisors (see below), whose sum is σ = 29782032896. Its totient is φ = 3186933984.

The previous prime is 11161265509. The next prime is 11161265569. The reversal of 11161265556 is 65556216111.

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, 95835 + ... + 177501.

Almost surely, 2^11161265556 is an apocalyptic number.

It is an amenable number.

11161265556 is an abundant number, since it is smaller than the sum of its proper divisors (18620767340).

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

11161265556 is a wasteful number, since it uses less digits than its factorization.

11161265556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83308 (or 83306 counting only the distinct ones).

The product of its digits is 54000, while the sum is 39.

The spelling of 11161265556 in words is "eleven billion, one hundred sixty-one million, two hundred sixty-five thousand, five hundred fifty-six".