131686556860 has 24 divisors (see below), whose sum is σ = 281228920560. Its totient is φ = 51781832064.

The previous prime is 131686556843. The next prime is 131686556861. The reversal of 131686556860 is 68655686131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131686556861) 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, 55798209 + ... + 55800568.

It is an arithmetic number, because the mean of its divisors is an integer number (11717871690).

Almost surely, 2^131686556860 is an apocalyptic number.

131686556860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

131686556860 is an abundant number, since it is smaller than the sum of its proper divisors (149542363700).

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

131686556860 is a wasteful number, since it uses less digits than its factorization.

131686556860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111598845 (or 111598843 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 55.

The spelling of 131686556860 in words is "one hundred thirty-one billion, six hundred eighty-six million, five hundred fifty-six thousand, eight hundred sixty".