51355306536817 has 2 divisors, whose sum is σ = 51355306536818. Its totient is φ = 51355306536816.

The previous prime is 51355306536811. The next prime is 51355306536907. The reversal of 51355306536817 is 71863560355315.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33524609521936 + 17830697014881 = 5790044^2 + 4222641^2 .

It is a cyclic number.

It is not a de Polignac number, because 51355306536817 - 2⁷ = 51355306536689 is a prime.

It is not a weakly prime, because it can be changed into another prime (51355306536811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25677653268408 + 25677653268409.

It is an arithmetic number, because the mean of its divisors is an integer number (25677653268409).

Almost surely, 2^{51355306536817} is an apocalyptic number.

It is an amenable number.

51355306536817 is a deficient number, since it is larger than the sum of its proper divisors (1).

51355306536817 is an equidigital number, since it uses as much as digits as its factorization.

51355306536817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34020000, while the sum is 58.

The spelling of 51355306536817 in words is "fifty-one trillion, three hundred fifty-five billion, three hundred six million, five hundred thirty-six thousand, eight hundred seventeen".