131544392156866 has 16 divisors (see below), whose sum is σ = 212498638007544. Its totient is φ = 60711696186624.

The previous prime is 131544392156851. The next prime is 131544392156867. The reversal of 131544392156866 is 668651293445131.

It can be written as a sum of positive squares in 4 ways, for example, as 113400583358841 + 18143808798025 = 10648971^2 + 4259555^2 .

It is a junction number, because it is equal to n+sod(n) for n = 131544392156798 and 131544392156807.

It is not an unprimeable number, because it can be changed into a prime (131544392156867) 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, 44378145 + ... + 47249428.

Almost surely, 2^{131544392156866} is an apocalyptic number.

131544392156866 is a deficient number, since it is larger than the sum of its proper divisors (80954245850678).

131544392156866 is a wasteful number, since it uses less digits than its factorization.

131544392156866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91682805.

The product of its digits is 111974400, while the sum is 64.

The spelling of 131544392156866 in words is "one hundred thirty-one trillion, five hundred forty-four billion, three hundred ninety-two million, one hundred fifty-six thousand, eight hundred sixty-six".