51350720636641 has 2 divisors, whose sum is σ = 51350720636642. Its totient is φ = 51350720636640.

The previous prime is 51350720636627. The next prime is 51350720636653. The reversal of 51350720636641 is 14663602705315.

51350720636641 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., 44373304046241 + 6977416590400 = 6661329^2 + 2641480^2 .

It is a cyclic number.

It is not a de Polignac number, because 51350720636641 - 2⁵ = 51350720636609 is a prime.

It is not a weakly prime, because it can be changed into another prime (51350720636681) 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, 25675360318320 + 25675360318321.

It is an arithmetic number, because the mean of its divisors is an integer number (25675360318321).

Almost surely, 2^{51350720636641} is an apocalyptic number.

It is an amenable number.

51350720636641 is a deficient number, since it is larger than the sum of its proper divisors (1).

51350720636641 is an equidigital number, since it uses as much as digits as its factorization.

51350720636641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2721600, while the sum is 49.

The spelling of 51350720636641 in words is "fifty-one trillion, three hundred fifty billion, seven hundred twenty million, six hundred thirty-six thousand, six hundred forty-one".