51775959769 has 2 divisors, whose sum is σ = 51775959770. Its totient is φ = 51775959768.

The previous prime is 51775959761. The next prime is 51775959791. The reversal of 51775959769 is 96795957715.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50450999769 + 1324960000 = 224613^2 + 36400^2 .

It is a cyclic number.

It is not a de Polignac number, because 51775959769 - 2³ = 51775959761 is a prime.

It is a super-2 number, since 2×51775959769² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51775959698 and 51775959707.

It is not a weakly prime, because it can be changed into another prime (51775959761) 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, 25887979884 + 25887979885.

It is an arithmetic number, because the mean of its divisors is an integer number (25887979885).

Almost surely, 2^51775959769 is an apocalyptic number.

It is an amenable number.

51775959769 is a deficient number, since it is larger than the sum of its proper divisors (1).

51775959769 is an equidigital number, since it uses as much as digits as its factorization.

51775959769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 187535250, while the sum is 70.

The spelling of 51775959769 in words is "fifty-one billion, seven hundred seventy-five million, nine hundred fifty-nine thousand, seven hundred sixty-nine".