505500302809 has 2 divisors, whose sum is σ = 505500302810. Its totient is φ = 505500302808.

The previous prime is 505500302789. The next prime is 505500302821. The reversal of 505500302809 is 908203005505.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 487863134784 + 17637168025 = 698472^2 + 132805^2 .

It is a cyclic number.

It is not a de Polignac number, because 505500302809 - 2²⁹ = 504963431897 is a prime.

It is a super-2 number, since 2×505500302809² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (505500302849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252750151404 + 252750151405.

It is an arithmetic number, because the mean of its divisors is an integer number (252750151405).

Almost surely, 2^505500302809 is an apocalyptic number.

It is an amenable number.

505500302809 is a deficient number, since it is larger than the sum of its proper divisors (1).

505500302809 is an equidigital number, since it uses as much as digits as its factorization.

505500302809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54000, while the sum is 37.

The spelling of 505500302809 in words is "five hundred five billion, five hundred million, three hundred two thousand, eight hundred nine".