51726068566213 has 2 divisors, whose sum is σ = 51726068566214. Its totient is φ = 51726068566212.

The previous prime is 51726068566199. The next prime is 51726068566259. The reversal of 51726068566213 is 31266586062715.

It is a happy number.

51726068566213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38427625796004 + 13298442770209 = 6199002^2 + 3646703^2 .

It is a cyclic number.

It is not a de Polignac number, because 51726068566213 - 2¹⁷ = 51726068435141 is a prime.

It is a super-2 number, since 2×51726068566213² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51726068566013) 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, 25863034283106 + 25863034283107.

It is an arithmetic number, because the mean of its divisors is an integer number (25863034283107).

Almost surely, 2^{51726068566213} is an apocalyptic number.

It is an amenable number.

51726068566213 is a deficient number, since it is larger than the sum of its proper divisors (1).

51726068566213 is an equidigital number, since it uses as much as digits as its factorization.

51726068566213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21772800, while the sum is 58.

The spelling of 51726068566213 in words is "fifty-one trillion, seven hundred twenty-six billion, sixty-eight million, five hundred sixty-six thousand, two hundred thirteen".