505420644539 has 2 divisors, whose sum is σ = 505420644540. Its totient is φ = 505420644538.

The previous prime is 505420644439. The next prime is 505420644551. The reversal of 505420644539 is 935446024505.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 505420644539 - 2¹⁶ = 505420579003 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 505420644493 and 505420644502.

It is not a weakly prime, because it can be changed into another prime (505420644439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252710322269 + 252710322270.

It is an arithmetic number, because the mean of its divisors is an integer number (252710322270).

Almost surely, 2^505420644539 is an apocalyptic number.

505420644539 is a deficient number, since it is larger than the sum of its proper divisors (1).

505420644539 is an equidigital number, since it uses as much as digits as its factorization.

505420644539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592000, while the sum is 47.

The spelling of 505420644539 in words is "five hundred five billion, four hundred twenty million, six hundred forty-four thousand, five hundred thirty-nine".