131557818682 has 32 divisors (see below), whose sum is σ = 203726048400. Its totient is φ = 63684960768.

The previous prime is 131557818671. The next prime is 131557818701. The reversal of 131557818682 is 286818755131.

It is a Cunningham number, because it is equal to 362709²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 94839977521 + 36717841161 = 307961^2 + 191619^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4788208 + ... + 4815604.

Almost surely, 2^131557818682 is an apocalyptic number.

131557818682 is a deficient number, since it is larger than the sum of its proper divisors (72168229718).

131557818682 is a wasteful number, since it uses less digits than its factorization.

131557818682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28050.

The product of its digits is 3225600, while the sum is 55.

The spelling of 131557818682 in words is "one hundred thirty-one billion, five hundred fifty-seven million, eight hundred eighteen thousand, six hundred eighty-two".