11980855686 has 8 divisors (see below), whose sum is σ = 23961711384. Its totient is φ = 3993618560.

The previous prime is 11980855651. The next prime is 11980855729. The reversal of 11980855686 is 68655808911.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

11980855686 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 998404635 + ... + 998404646.

It is an arithmetic number, because the mean of its divisors is an integer number (2995213923).

Almost surely, 2^11980855686 is an apocalyptic number.

11980855686 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

11980855686 is a wasteful number, since it uses less digits than its factorization.

11980855686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1996809286.

The product of its (nonzero) digits is 4147200, while the sum is 57.

The spelling of 11980855686 in words is "eleven billion, nine hundred eighty million, eight hundred fifty-five thousand, six hundred eighty-six".