11931260866 has 16 divisors (see below), whose sum is σ = 20456856000. Its totient is φ = 5112581040.

The previous prime is 11931260863. The next prime is 11931260917. The reversal of 11931260866 is 66806213911.

It is not an unprimeable number, because it can be changed into a prime (11931260863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27385 + ... + 156883.

It is an arithmetic number, because the mean of its divisors is an integer number (1278553500).

Almost surely, 2^11931260866 is an apocalyptic number.

11931260866 is a deficient number, since it is larger than the sum of its proper divisors (8525595134).

11931260866 is a wasteful number, since it uses less digits than its factorization.

11931260866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136089.

The product of its (nonzero) digits is 93312, while the sum is 43.

The spelling of 11931260866 in words is "eleven billion, nine hundred thirty-one million, two hundred sixty thousand, eight hundred sixty-six".