51806142673 has 2 divisors, whose sum is σ = 51806142674. Its totient is φ = 51806142672.

The previous prime is 51806142649. The next prime is 51806142697. The reversal of 51806142673 is 37624160815.

It is a balanced prime because it is at equal distance from previous prime (51806142649) and next prime (51806142697).

It can be written as a sum of positive squares in only one way, i.e., 33986028609 + 17820114064 = 184353^2 + 133492^2 .

It is a cyclic number.

It is not a de Polignac number, because 51806142673 - 2¹³ = 51806134481 is a prime.

It is not a weakly prime, because it can be changed into another prime (51806142173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25903071336 + 25903071337.

It is an arithmetic number, because the mean of its divisors is an integer number (25903071337).

Almost surely, 2^51806142673 is an apocalyptic number.

It is an amenable number.

51806142673 is a deficient number, since it is larger than the sum of its proper divisors (1).

51806142673 is an equidigital number, since it uses as much as digits as its factorization.

51806142673 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 241920, while the sum is 43.

The spelling of 51806142673 in words is "fifty-one billion, eight hundred six million, one hundred forty-two thousand, six hundred seventy-three".