11681191116 has 120 divisors (see below), whose sum is σ = 35842844576. Its totient is φ = 3247257600.

The previous prime is 11681191103. The next prime is 11681191117. The reversal of 11681191116 is 61119118611.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (11681191117) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 14316 + ... + 153516.

Almost surely, 2^11681191116 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 11681191116, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17921422288).

11681191116 is an abundant number, since it is smaller than the sum of its proper divisors (24161653460).

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

11681191116 is a wasteful number, since it uses less digits than its factorization.

11681191116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139261 (or 139250 counting only the distinct ones).

The product of its digits is 2592, while the sum is 36.

The spelling of 11681191116 in words is "eleven billion, six hundred eighty-one million, one hundred ninety-one thousand, one hundred sixteen".