131644384657 has 2 divisors, whose sum is σ = 131644384658. Its totient is φ = 131644384656.

The previous prime is 131644384607. The next prime is 131644384693. The reversal of 131644384657 is 756483446131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108721213441 + 22923171216 = 329729^2 + 151404^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131644384657 is a prime.

It is not a weakly prime, because it can be changed into another prime (131644384607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65822192328 + 65822192329.

It is an arithmetic number, because the mean of its divisors is an integer number (65822192329).

Almost surely, 2^131644384657 is an apocalyptic number.

It is an amenable number.

131644384657 is a deficient number, since it is larger than the sum of its proper divisors (1).

131644384657 is an equidigital number, since it uses as much as digits as its factorization.

131644384657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5806080, while the sum is 52.

The spelling of 131644384657 in words is "one hundred thirty-one billion, six hundred forty-four million, three hundred eighty-four thousand, six hundred fifty-seven".