51063695989 has 2 divisors, whose sum is σ = 51063695990. Its totient is φ = 51063695988.

The previous prime is 51063695983. The next prime is 51063696001. The reversal of 51063695989 is 98959636015.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45383059089 + 5680636900 = 213033^2 + 75370^2 .

It is a cyclic number.

It is not a de Polignac number, because 51063695989 - 2⁹ = 51063695477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51063695983) 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, 25531847994 + 25531847995.

It is an arithmetic number, because the mean of its divisors is an integer number (25531847995).

Almost surely, 2^51063695989 is an apocalyptic number.

It is an amenable number.

51063695989 is a deficient number, since it is larger than the sum of its proper divisors (1).

51063695989 is an equidigital number, since it uses as much as digits as its factorization.

51063695989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15746400, while the sum is 61.

The spelling of 51063695989 in words is "fifty-one billion, sixty-three million, six hundred ninety-five thousand, nine hundred eighty-nine".