51568747289 has 2 divisors, whose sum is σ = 51568747290. Its totient is φ = 51568747288.

The previous prime is 51568747187. The next prime is 51568747313. The reversal of 51568747289 is 98274786515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46053160000 + 5515587289 = 214600^2 + 74267^2 .

It is a cyclic number.

It is not a de Polignac number, because 51568747289 - 2²⁸ = 51300311833 is a prime.

It is not a weakly prime, because it can be changed into another prime (51568747589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25784373644 + 25784373645.

It is an arithmetic number, because the mean of its divisors is an integer number (25784373645).

Almost surely, 2^51568747289 is an apocalyptic number.

It is an amenable number.

51568747289 is a deficient number, since it is larger than the sum of its proper divisors (1).

51568747289 is an equidigital number, since it uses as much as digits as its factorization.

51568747289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 33868800, while the sum is 62.

The spelling of 51568747289 in words is "fifty-one billion, five hundred sixty-eight million, seven hundred forty-seven thousand, two hundred eighty-nine".