51277975424321 has 2 divisors, whose sum is σ = 51277975424322. Its totient is φ = 51277975424320.

The previous prime is 51277975424243. The next prime is 51277975424353. The reversal of 51277975424321 is 12342457977215.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51277615183921 + 360240400 = 7160839^2 + 18980^2 .

It is a cyclic number.

It is not a de Polignac number, because 51277975424321 - 2¹⁸ = 51277975162177 is a prime.

It is a super-2 number, since 2×51277975424321² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51277975424021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25638987712160 + 25638987712161.

It is an arithmetic number, because the mean of its divisors is an integer number (25638987712161).

Almost surely, 2^{51277975424321} is an apocalyptic number.

It is an amenable number.

51277975424321 is a deficient number, since it is larger than the sum of its proper divisors (1).

51277975424321 is an equidigital number, since it uses as much as digits as its factorization.

51277975424321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29635200, while the sum is 59.

The spelling of 51277975424321 in words is "fifty-one trillion, two hundred seventy-seven billion, nine hundred seventy-five million, four hundred twenty-four thousand, three hundred twenty-one".