51793297657 has 2 divisors, whose sum is σ = 51793297658. Its totient is φ = 51793297656.

The previous prime is 51793297651. The next prime is 51793297693. The reversal of 51793297657 is 75679239715.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47941729936 + 3851567721 = 218956^2 + 62061^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51793297657 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51793297595 and 51793297604.

It is not a weakly prime, because it can be changed into another prime (51793297651) 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, 25896648828 + 25896648829.

It is an arithmetic number, because the mean of its divisors is an integer number (25896648829).

Almost surely, 2^51793297657 is an apocalyptic number.

It is an amenable number.

51793297657 is a deficient number, since it is larger than the sum of its proper divisors (1).

51793297657 is an equidigital number, since it uses as much as digits as its factorization.

51793297657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25004700, while the sum is 61.

The spelling of 51793297657 in words is "fifty-one billion, seven hundred ninety-three million, two hundred ninety-seven thousand, six hundred fifty-seven".