51821167866277 has 2 divisors, whose sum is σ = 51821167866278. Its totient is φ = 51821167866276.

The previous prime is 51821167866191. The next prime is 51821167866289. The reversal of 51821167866277 is 77266876112815.

51821167866277 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., 43774181834436 + 8046986031841 = 6616206^2 + 2836721^2 .

It is a cyclic number.

It is not a de Polignac number, because 51821167866277 - 2³⁵ = 51786808127909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51821167866877) 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, 25910583933138 + 25910583933139.

It is an arithmetic number, because the mean of its divisors is an integer number (25910583933139).

Almost surely, 2^{51821167866277} is an apocalyptic number.

It is an amenable number.

51821167866277 is a deficient number, since it is larger than the sum of its proper divisors (1).

51821167866277 is an equidigital number, since it uses as much as digits as its factorization.

51821167866277 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 94832640, while the sum is 67.

The spelling of 51821167866277 in words is "fifty-one trillion, eight hundred twenty-one billion, one hundred sixty-seven million, eight hundred sixty-six thousand, two hundred seventy-seven".