51349137089 has 2 divisors, whose sum is σ = 51349137090. Its totient is φ = 51349137088.

The previous prime is 51349137067. The next prime is 51349137107. The reversal of 51349137089 is 98073194315.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37304991025 + 14044146064 = 193145^2 + 118508^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51349137089 is a prime.

It is not a weakly prime, because it can be changed into another prime (51349137289) 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, 25674568544 + 25674568545.

It is an arithmetic number, because the mean of its divisors is an integer number (25674568545).

Almost surely, 2^51349137089 is an apocalyptic number.

It is an amenable number.

51349137089 is a deficient number, since it is larger than the sum of its proper divisors (1).

51349137089 is an equidigital number, since it uses as much as digits as its factorization.

51349137089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 816480, while the sum is 50.

The spelling of 51349137089 in words is "fifty-one billion, three hundred forty-nine million, one hundred thirty-seven thousand, eighty-nine".