11891881080306 has 12 divisors (see below), whose sum is σ = 25765742340702. Its totient is φ = 3963960360096.

The previous prime is 11891881080293. The next prime is 11891881080307. The reversal of 11891881080306 is 60308018819811.

It is a happy number.

11891881080306 is a `hidden beast` number, since 1 + 1 + 89 + 188 + 1 + 0 + 80 + 306 = 666.

It can be written as a sum of positive squares in only one way, i.e., 10693939885281 + 1197941195025 = 3270159^2 + 1094505^2 .

It is not an unprimeable number, because it can be changed into a prime (11891881080307) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 330330029991 + ... + 330330030026.

Almost surely, 2^{11891881080306} is an apocalyptic number.

11891881080306 is an abundant number, since it is smaller than the sum of its proper divisors (13873861260396).

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

11891881080306 is a wasteful number, since it uses less digits than its factorization.

11891881080306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660660060025 (or 660660060022 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 54.

The spelling of 11891881080306 in words is "eleven trillion, eight hundred ninety-one billion, eight hundred eighty-one million, eighty thousand, three hundred six".