51726513457 has 2 divisors, whose sum is σ = 51726513458. Its totient is φ = 51726513456.

The previous prime is 51726513431. The next prime is 51726513469. The reversal of 51726513457 is 75431562715.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33132736576 + 18593776881 = 182024^2 + 136359^2 .

It is a cyclic number.

It is not a de Polignac number, because 51726513457 - 2¹¹ = 51726511409 is a prime.

It is not a weakly prime, because it can be changed into another prime (51726513407) 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, 25863256728 + 25863256729.

It is an arithmetic number, because the mean of its divisors is an integer number (25863256729).

Almost surely, 2^51726513457 is an apocalyptic number.

It is an amenable number.

51726513457 is a deficient number, since it is larger than the sum of its proper divisors (1).

51726513457 is an equidigital number, since it uses as much as digits as its factorization.

51726513457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 882000, while the sum is 46.

The spelling of 51726513457 in words is "fifty-one billion, seven hundred twenty-six million, five hundred thirteen thousand, four hundred fifty-seven".