11161011156 has 96 divisors (see below), whose sum is σ = 28089452160. Its totient is φ = 3436339200.

The previous prime is 11161011149. The next prime is 11161011193. The reversal of 11161011156 is 65111016111.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8199916 + ... + 8201276.

It is an arithmetic number, because the mean of its divisors is an integer number (292598460).

Almost surely, 2^11161011156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11161011156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14044726080).

11161011156 is an abundant number, since it is smaller than the sum of its proper divisors (16928441004).

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

11161011156 is a wasteful number, since it uses less digits than its factorization.

11161011156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2105 (or 2103 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 24.

Adding to 11161011156 its reverse (65111016111), we get a palindrome (76272027267).

The spelling of 11161011156 in words is "eleven billion, one hundred sixty-one million, eleven thousand, one hundred fifty-six".