51800885173 has 2 divisors, whose sum is σ = 51800885174. Its totient is φ = 51800885172.

The previous prime is 51800885159. The next prime is 51800885263. The reversal of 51800885173 is 37158800815.

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., 39649570884 + 12151314289 = 199122^2 + 110233^2 .

It is a cyclic number.

It is not a de Polignac number, because 51800885173 - 2⁵ = 51800885141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51800885273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25900442586 + 25900442587.

It is an arithmetic number, because the mean of its divisors is an integer number (25900442587).

Almost surely, 2^51800885173 is an apocalyptic number.

It is an amenable number.

51800885173 is a deficient number, since it is larger than the sum of its proper divisors (1).

51800885173 is an equidigital number, since it uses as much as digits as its factorization.

51800885173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 268800, while the sum is 46.

The spelling of 51800885173 in words is "fifty-one billion, eight hundred million, eight hundred eighty-five thousand, one hundred seventy-three".