51706055761 has 2 divisors, whose sum is σ = 51706055762. Its totient is φ = 51706055760.

The previous prime is 51706055699. The next prime is 51706055771. The reversal of 51706055761 is 16755060715.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49390617600 + 2315438161 = 222240^2 + 48119^2 .

It is a cyclic number.

It is not a de Polignac number, because 51706055761 - 2¹⁹ = 51705531473 is a prime.

It is not a weakly prime, because it can be changed into another prime (51706055771) by changing a digit.

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 as a sum of consecutive naturals, namely, 25853027880 + 25853027881.

It is an arithmetic number, because the mean of its divisors is an integer number (25853027881).

Almost surely, 2^51706055761 is an apocalyptic number.

It is an amenable number.

51706055761 is a deficient number, since it is larger than the sum of its proper divisors (1).

51706055761 is an equidigital number, since it uses as much as digits as its factorization.

51706055761 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 220500, while the sum is 43.

The spelling of 51706055761 in words is "fifty-one billion, seven hundred six million, fifty-five thousand, seven hundred sixty-one".