51744644644717 has 2 divisors, whose sum is σ = 51744644644718. Its totient is φ = 51744644644716.

The previous prime is 51744644644711. The next prime is 51744644644783. The reversal of 51744644644717 is 71744644644715.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29743563582756 + 22001081061961 = 5453766^2 + 4690531^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51744644644717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51744644644711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25872322322358 + 25872322322359.

It is an arithmetic number, because the mean of its divisors is an integer number (25872322322359).

Almost surely, 2^{51744644644717} is an apocalyptic number.

It is an amenable number.

51744644644717 is a deficient number, since it is larger than the sum of its proper divisors (1).

51744644644717 is an equidigital number, since it uses as much as digits as its factorization.

51744644644717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 252887040, while the sum is 64.

The spelling of 51744644644717 in words is "fifty-one trillion, seven hundred forty-four billion, six hundred forty-four million, six hundred forty-four thousand, seven hundred seventeen".