51727593391961 has 2 divisors, whose sum is σ = 51727593391962. Its totient is φ = 51727593391960.

The previous prime is 51727593391867. The next prime is 51727593392017. The reversal of 51727593391961 is 16919339572715.

51727593391961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38537215387225 + 13190378004736 = 6207835^2 + 3631856^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51727593391961 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51727593391891 and 51727593391900.

It is not a weakly prime, because it can be changed into another prime (51727593391561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25863796695980 + 25863796695981.

It is an arithmetic number, because the mean of its divisors is an integer number (25863796695981).

Almost surely, 2^{51727593391961} is an apocalyptic number.

It is an amenable number.

51727593391961 is a deficient number, since it is larger than the sum of its proper divisors (1).

51727593391961 is an equidigital number, since it uses as much as digits as its factorization.

51727593391961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96446700, while the sum is 68.

The spelling of 51727593391961 in words is "fifty-one trillion, seven hundred twenty-seven billion, five hundred ninety-three million, three hundred ninety-one thousand, nine hundred sixty-one".