131872644361 has 4 divisors (see below), whose sum is σ = 131873371924. Its totient is φ = 131871916800.

The previous prime is 131872644287. The next prime is 131872644373. The reversal of 131872644361 is 163446278131.

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, and also an emirpimes, since its reverse is a distinct semiprime: 163446278131 = 164149 ⋅995719.

It can be written as a sum of positive squares in 2 ways, for example, as 91714488336 + 40158156025 = 302844^2 + 200395^2 .

It is a cyclic number.

It is not a de Polignac number, because 131872644361 - 2³⁵ = 97512905993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131872644061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149581 + ... + 534901.

It is an arithmetic number, because the mean of its divisors is an integer number (32968342981).

Almost surely, 2^131872644361 is an apocalyptic number.

It is an amenable number.

131872644361 is a deficient number, since it is larger than the sum of its proper divisors (727563).

131872644361 is an equidigital number, since it uses as much as digits as its factorization.

131872644361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727562.

The product of its digits is 580608, while the sum is 46.

The spelling of 131872644361 in words is "one hundred thirty-one billion, eight hundred seventy-two million, six hundred forty-four thousand, three hundred sixty-one".