505544640329 has 2 divisors, whose sum is σ = 505544640330. Its totient is φ = 505544640328.

The previous prime is 505544640199. The next prime is 505544640371. The reversal of 505544640329 is 923046445505.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 505275023929 + 269616400 = 710827^2 + 16420^2 .

It is a cyclic number.

It is not a de Polignac number, because 505544640329 - 2¹⁶ = 505544574793 is a prime.

It is not a weakly prime, because it can be changed into another prime (505544640529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252772320164 + 252772320165.

It is an arithmetic number, because the mean of its divisors is an integer number (252772320165).

Almost surely, 2^505544640329 is an apocalyptic number.

It is an amenable number.

505544640329 is a deficient number, since it is larger than the sum of its proper divisors (1).

505544640329 is an equidigital number, since it uses as much as digits as its factorization.

505544640329 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 505544640329 in words is "five hundred five billion, five hundred forty-four million, six hundred forty thousand, three hundred twenty-nine".