51061723289 has 2 divisors, whose sum is σ = 51061723290. Its totient is φ = 51061723288.

The previous prime is 51061723259. The next prime is 51061723303. The reversal of 51061723289 is 98232716015.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51038490889 + 23232400 = 225917^2 + 4820^2 .

It is a cyclic number.

It is not a de Polignac number, because 51061723289 - 2¹² = 51061719193 is a prime.

It is not a weakly prime, because it can be changed into another prime (51061723259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25530861644 + 25530861645.

It is an arithmetic number, because the mean of its divisors is an integer number (25530861645).

Almost surely, 2^51061723289 is an apocalyptic number.

It is an amenable number.

51061723289 is a deficient number, since it is larger than the sum of its proper divisors (1).

51061723289 is an equidigital number, since it uses as much as digits as its factorization.

51061723289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 44.

The spelling of 51061723289 in words is "fifty-one billion, sixty-one million, seven hundred twenty-three thousand, two hundred eighty-nine".