505216139663 has 2 divisors, whose sum is σ = 505216139664. Its totient is φ = 505216139662.

The previous prime is 505216139591. The next prime is 505216139669. The reversal of 505216139663 is 366931612505.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 505216139663 - 2¹⁸ = 505215877519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505216139669) 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, 252608069831 + 252608069832.

It is an arithmetic number, because the mean of its divisors is an integer number (252608069832).

Almost surely, 2^505216139663 is an apocalyptic number.

505216139663 is a deficient number, since it is larger than the sum of its proper divisors (1).

505216139663 is an equidigital number, since it uses as much as digits as its factorization.

505216139663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 874800, while the sum is 47.

The spelling of 505216139663 in words is "five hundred five billion, two hundred sixteen million, one hundred thirty-nine thousand, six hundred sixty-three".