505555403263 has 2 divisors, whose sum is σ = 505555403264. Its totient is φ = 505555403262.

The previous prime is 505555403251. The next prime is 505555403273. The reversal of 505555403263 is 362304555505.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505555403263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505555403273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252777701631 + 252777701632.

It is an arithmetic number, because the mean of its divisors is an integer number (252777701632).

Almost surely, 2^505555403263 is an apocalyptic number.

505555403263 is a deficient number, since it is larger than the sum of its proper divisors (1).

505555403263 is an equidigital number, since it uses as much as digits as its factorization.

505555403263 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1350000, while the sum is 43.

Adding to 505555403263 its reverse (362304555505), we get a palindrome (867859958768).

The spelling of 505555403263 in words is "five hundred five billion, five hundred fifty-five million, four hundred three thousand, two hundred sixty-three".