131432165215861 has 8 divisors (see below), whose sum is σ = 137375566473600. Its totient is φ = 125507843899152.

The previous prime is 131432165215853. The next prime is 131432165215889. The reversal of 131432165215861 is 168512561234131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 131432165215861 - 2³ = 131432165215853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131432165215261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4769971170 + ... + 4769998723.

It is an arithmetic number, because the mean of its divisors is an integer number (17171945809200).

Almost surely, 2^{131432165215861} is an apocalyptic number.

It is an amenable number.

131432165215861 is a deficient number, since it is larger than the sum of its proper divisors (5943401257739).

131432165215861 is an equidigital number, since it uses as much as digits as its factorization.

131432165215861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9539970515.

The product of its digits is 1036800, while the sum is 49.

The spelling of 131432165215861 in words is "one hundred thirty-one trillion, four hundred thirty-two billion, one hundred sixty-five million, two hundred fifteen thousand, eight hundred sixty-one".