505516805399 has 2 divisors, whose sum is σ = 505516805400. Its totient is φ = 505516805398.

The previous prime is 505516805389. The next prime is 505516805461. The reversal of 505516805399 is 993508615505.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 505516805399 - 2⁴ = 505516805383 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505516805389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252758402699 + 252758402700.

It is an arithmetic number, because the mean of its divisors is an integer number (252758402700).

Almost surely, 2^505516805399 is an apocalyptic number.

505516805399 is a deficient number, since it is larger than the sum of its proper divisors (1).

505516805399 is an equidigital number, since it uses as much as digits as its factorization.

505516805399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7290000, while the sum is 56.

The spelling of 505516805399 in words is "five hundred five billion, five hundred sixteen million, eight hundred five thousand, three hundred ninety-nine".