505128466229 has 2 divisors, whose sum is σ = 505128466230. Its totient is φ = 505128466228.

The previous prime is 505128466207. The next prime is 505128466351. The reversal of 505128466229 is 922664821505.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 470225632900 + 34902833329 = 685730^2 + 186823^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505128466229 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505128486229) 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, 252564233114 + 252564233115.

It is an arithmetic number, because the mean of its divisors is an integer number (252564233115).

Almost surely, 2^505128466229 is an apocalyptic number.

It is an amenable number.

505128466229 is a deficient number, since it is larger than the sum of its proper divisors (1).

505128466229 is an equidigital number, since it uses as much as digits as its factorization.

505128466229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2073600, while the sum is 50.

The spelling of 505128466229 in words is "five hundred five billion, one hundred twenty-eight million, four hundred sixty-six thousand, two hundred twenty-nine".