131583864644 has 12 divisors (see below), whose sum is σ = 243817161084. Its totient is φ = 61921818624.

The previous prime is 131583864613. The next prime is 131583864653. The reversal of 131583864644 is 446468385131.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 39828184900 + 91755679744 = 199570^2 + 302912^2 .

It is a hoax number, since the sum of its digits (53) coincides with the sum of the digits of its distinct prime factors.

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 3 ways as a sum of consecutive naturals, for example, 967528349 + ... + 967528484.

It is an arithmetic number, because the mean of its divisors is an integer number (20318096757).

Almost surely, 2^131583864644 is an apocalyptic number.

It is an amenable number.

131583864644 is a deficient number, since it is larger than the sum of its proper divisors (112233296440).

131583864644 is a wasteful number, since it uses less digits than its factorization.

131583864644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1935056854 (or 1935056852 counting only the distinct ones).

The product of its digits is 6635520, while the sum is 53.

The spelling of 131583864644 in words is "one hundred thirty-one billion, five hundred eighty-three million, eight hundred sixty-four thousand, six hundred forty-four".