131081611388 has 24 divisors (see below), whose sum is σ = 282329625312. Its totient is φ = 51856461504.

The previous prime is 131081611321. The next prime is 131081611421. The reversal of 131081611388 is 883116180131.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 180056795 + ... + 180057522.

It is an arithmetic number, because the mean of its divisors is an integer number (11763734388).

Almost surely, 2^131081611388 is an apocalyptic number.

It is an amenable number.

131081611388 is an abundant number, since it is smaller than the sum of its proper divisors (151248013924).

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

131081611388 is a wasteful number, since it uses less digits than its factorization.

131081611388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360114341 (or 360114339 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 41.

The spelling of 131081611388 in words is "one hundred thirty-one billion, eighty-one million, six hundred eleven thousand, three hundred eighty-eight".