505405911319 has 2 divisors, whose sum is σ = 505405911320. Its totient is φ = 505405911318.

The previous prime is 505405911289. The next prime is 505405911371. The reversal of 505405911319 is 913119504505.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 505405911319 - 2¹⁷ = 505405780247 is a prime.

It is a super-2 number, since 2×505405911319² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505405911379) 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, 252702955659 + 252702955660.

It is an arithmetic number, because the mean of its divisors is an integer number (252702955660).

Almost surely, 2^505405911319 is an apocalyptic number.

505405911319 is a deficient number, since it is larger than the sum of its proper divisors (1).

505405911319 is an equidigital number, since it uses as much as digits as its factorization.

505405911319 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 121500, while the sum is 43.

The spelling of 505405911319 in words is "five hundred five billion, four hundred five million, nine hundred eleven thousand, three hundred nineteen".