131642534641 has 4 divisors (see below), whose sum is σ = 131656170484. Its totient is φ = 131628898800.

The previous prime is 131642534629. The next prime is 131642534719. The reversal of 131642534641 is 146435246131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 146435246131 = 14281 ⋅10253851.

It can be written as a sum of positive squares in 2 ways, for example, as 8872886416 + 122769648225 = 94196^2 + 350385^2 .

It is a cyclic number.

It is not a de Polignac number, because 131642534641 - 2³³ = 123052600049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131642534594 and 131642534603.

It is not an unprimeable number, because it can be changed into a prime (131642534941) 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, 6803430 + ... + 6822751.

It is an arithmetic number, because the mean of its divisors is an integer number (32914042621).

Almost surely, 2^131642534641 is an apocalyptic number.

It is an amenable number.

131642534641 is a deficient number, since it is larger than the sum of its proper divisors (13635843).

131642534641 is an equidigital number, since it uses as much as digits as its factorization.

131642534641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13635842.

The product of its digits is 207360, while the sum is 40.

The spelling of 131642534641 in words is "one hundred thirty-one billion, six hundred forty-two million, five hundred thirty-four thousand, six hundred forty-one".