51969556559 has 2 divisors, whose sum is σ = 51969556560. Its totient is φ = 51969556558.

The previous prime is 51969556543. The next prime is 51969556591. The reversal of 51969556559 is 95565596915.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51969556559 - 2⁴ = 51969556543 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51969556495 and 51969556504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51969556159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25984778279 + 25984778280.

It is an arithmetic number, because the mean of its divisors is an integer number (25984778280).

Almost surely, 2^51969556559 is an apocalyptic number.

51969556559 is a deficient number, since it is larger than the sum of its proper divisors (1).

51969556559 is an equidigital number, since it uses as much as digits as its factorization.

51969556559 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82012500, while the sum is 65.

The spelling of 51969556559 in words is "fifty-one billion, nine hundred sixty-nine million, five hundred fifty-six thousand, five hundred fifty-nine".