505530025109 has 2 divisors, whose sum is σ = 505530025110. Its totient is φ = 505530025108.

The previous prime is 505530025009. The next prime is 505530025139. The reversal of 505530025109 is 901520035505.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 461326224100 + 44203801009 = 679210^2 + 210247^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505530025109 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 (505530025139) 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, 252765012554 + 252765012555.

It is an arithmetic number, because the mean of its divisors is an integer number (252765012555).

Almost surely, 2^505530025109 is an apocalyptic number.

It is an amenable number.

505530025109 is a deficient number, since it is larger than the sum of its proper divisors (1).

505530025109 is an equidigital number, since it uses as much as digits as its factorization.

505530025109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 33750, while the sum is 35.

The spelling of 505530025109 in words is "five hundred five billion, five hundred thirty million, twenty-five thousand, one hundred nine".