11531911914 has 24 divisors (see below), whose sum is σ = 25566876192. Its totient is φ = 3754575720.

The previous prime is 11531911891. The next prime is 11531911939. The reversal of 11531911914 is 41911913511.

11531911914 is a `hidden beast` number, since 1 + 1 + 531 + 9 + 119 + 1 + 4 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7448782 + ... + 7450329.

It is an arithmetic number, because the mean of its divisors is an integer number (1065286508).

Almost surely, 2^11531911914 is an apocalyptic number.

11531911914 is an abundant number, since it is smaller than the sum of its proper divisors (14034964278).

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

11531911914 is a wasteful number, since it uses less digits than its factorization.

11531911914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14899162 (or 14899159 counting only the distinct ones).

The product of its digits is 4860, while the sum is 36.

The spelling of 11531911914 in words is "eleven billion, five hundred thirty-one million, nine hundred eleven thousand, nine hundred fourteen".