51366141463421 has 2 divisors, whose sum is σ = 51366141463422. Its totient is φ = 51366141463420.

The previous prime is 51366141463409. The next prime is 51366141463447. The reversal of 51366141463421 is 12436414166315.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51320904427321 + 45237036100 = 7163861^2 + 212690^2 .

It is a cyclic number.

It is not a de Polignac number, because 51366141463421 - 2³⁴ = 51348961594237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51366641463421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25683070731710 + 25683070731711.

It is an arithmetic number, because the mean of its divisors is an integer number (25683070731711).

Almost surely, 2^{51366141463421} is an apocalyptic number.

It is an amenable number.

51366141463421 is a deficient number, since it is larger than the sum of its proper divisors (1).

51366141463421 is an equidigital number, since it uses as much as digits as its factorization.

51366141463421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1244160, while the sum is 47.

The spelling of 51366141463421 in words is "fifty-one trillion, three hundred sixty-six billion, one hundred forty-one million, four hundred sixty-three thousand, four hundred twenty-one".