51330420049 has 2 divisors, whose sum is σ = 51330420050. Its totient is φ = 51330420048.

The previous prime is 51330420019. The next prime is 51330420067. The reversal of 51330420049 is 94002403315.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51281867025 + 48553024 = 226455^2 + 6968^2 .

It is a cyclic number.

It is not a de Polignac number, because 51330420049 - 2⁹ = 51330419537 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51330420049.

It is not a weakly prime, because it can be changed into another prime (51330420019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25665210024 + 25665210025.

It is an arithmetic number, because the mean of its divisors is an integer number (25665210025).

Almost surely, 2^51330420049 is an apocalyptic number.

It is an amenable number.

51330420049 is a deficient number, since it is larger than the sum of its proper divisors (1).

51330420049 is an equidigital number, since it uses as much as digits as its factorization.

51330420049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 31.

The spelling of 51330420049 in words is "fifty-one billion, three hundred thirty million, four hundred twenty thousand, forty-nine".