131539379166 has 128 divisors (see below), whose sum is σ = 329301504000. Its totient is φ = 38617337088.

The previous prime is 131539379141. The next prime is 131539379171. The reversal of 131539379166 is 661973935131.

It is a happy number.

131539379166 is a `hidden beast` number, since 1 + 31 + 539 + 3 + 79 + 1 + 6 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6593755 + ... + 6613673.

It is an arithmetic number, because the mean of its divisors is an integer number (2572668000).

Almost surely, 2^131539379166 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131539379166, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (164650752000).

131539379166 is an abundant number, since it is smaller than the sum of its proper divisors (197762124834).

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

131539379166 is a wasteful number, since it uses less digits than its factorization.

131539379166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20375 (or 20369 counting only the distinct ones).

The product of its digits is 2755620, while the sum is 54.

The spelling of 131539379166 in words is "one hundred thirty-one billion, five hundred thirty-nine million, three hundred seventy-nine thousand, one hundred sixty-six".