131991382686 has 8 divisors (see below), whose sum is σ = 263982765384. Its totient is φ = 43997127560.

The previous prime is 131991382603. The next prime is 131991382723. The reversal of 131991382686 is 686283199131.

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

131991382686 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, 10999281885 + ... + 10999281896.

It is an arithmetic number, because the mean of its divisors is an integer number (32997845673).

Almost surely, 2^131991382686 is an apocalyptic number.

131991382686 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.

131991382686 is a wasteful number, since it uses less digits than its factorization.

131991382686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21998563786.

The product of its digits is 3359232, while the sum is 57.

The spelling of 131991382686 in words is "one hundred thirty-one billion, nine hundred ninety-one million, three hundred eighty-two thousand, six hundred eighty-six".