505105305433123 has 2 divisors, whose sum is σ = 505105305433124. Its totient is φ = 505105305433122.

The previous prime is 505105305433109. The next prime is 505105305433147. The reversal of 505105305433123 is 321334503501505.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505105305433123 is a prime.

It is not a weakly prime, because it can be changed into another prime (505105305433153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252552652716561 + 252552652716562.

It is an arithmetic number, because the mean of its divisors is an integer number (252552652716562).

Almost surely, 2^{505105305433123} is an apocalyptic number.

505105305433123 is a deficient number, since it is larger than the sum of its proper divisors (1).

505105305433123 is an equidigital number, since it uses as much as digits as its factorization.

505105305433123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 405000, while the sum is 40.

Adding to 505105305433123 its reverse (321334503501505), we get a palindrome (826439808934628).

The spelling of 505105305433123 in words is "five hundred five trillion, one hundred five billion, three hundred five million, four hundred thirty-three thousand, one hundred twenty-three".