131542776329 has 4 divisors (see below), whose sum is σ = 131543726340. Its totient is φ = 131541826320.

The previous prime is 131542776317. The next prime is 131542776331. The reversal of 131542776329 is 923677245131.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 67810764025 + 63732012304 = 260405^2 + 252452^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131542776329 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (131542776389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 222602 + ... + 559139.

It is an arithmetic number, because the mean of its divisors is an integer number (32885931585).

Almost surely, 2^131542776329 is an apocalyptic number.

It is an amenable number.

131542776329 is a deficient number, since it is larger than the sum of its proper divisors (950011).

131542776329 is an equidigital number, since it uses as much as digits as its factorization.

131542776329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 950010.

The product of its digits is 1905120, while the sum is 50.

The spelling of 131542776329 in words is "one hundred thirty-one billion, five hundred forty-two million, seven hundred seventy-six thousand, three hundred twenty-nine".