11331538668 has 72 divisors (see below), whose sum is σ = 30166456320. Its totient is φ = 3576566880.

The previous prime is 11331538627. The next prime is 11331538693. The reversal of 11331538668 is 86683513311.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2163613 + ... + 2168843.

It is an arithmetic number, because the mean of its divisors is an integer number (418978560).

Almost surely, 2^11331538668 is an apocalyptic number.

11331538668 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

11331538668 is an abundant number, since it is smaller than the sum of its proper divisors (18834917652).

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

11331538668 is a wasteful number, since it uses less digits than its factorization.

11331538668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8427 (or 8422 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The spelling of 11331538668 in words is "eleven billion, three hundred thirty-one million, five hundred thirty-eight thousand, six hundred sixty-eight".