131668831044 has 135 divisors (see below), whose sum is σ = 363620761581. Its totient is φ = 41540441760.

The previous prime is 131668831037. The next prime is 131668831079. The reversal of 131668831044 is 440138866131.

The square root of 131668831044 is 362862.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 86707869444 + 44960961600 = 294462^2 + 212040^2 .

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 44 ways as a sum of consecutive naturals, for example, 124098274 + ... + 124099334.

Almost surely, 2^131668831044 is an apocalyptic number.

131668831044 is the 362862-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131668831044

131668831044 is an abundant number, since it is smaller than the sum of its proper divisors (231951930537).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131668831044 is an equidigital number, since it uses as much as digits as its factorization.

131668831044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2176 (or 1085 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The spelling of 131668831044 in words is "one hundred thirty-one billion, six hundred sixty-eight million, eight hundred thirty-one thousand, forty-four".