520545511234549 has 2 divisors, whose sum is σ = 520545511234550. Its totient is φ = 520545511234548.

The previous prime is 520545511234513. The next prime is 520545511234561. The reversal of 520545511234549 is 945432115545025.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 319349158937649 + 201196352296900 = 17870343^2 + 14184370^2 .

It is a cyclic number.

It is not a de Polignac number, because 520545511234549 - 2¹⁷ = 520545511103477 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 520545511234549.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (520545511234249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260272755617274 + 260272755617275.

It is an arithmetic number, because the mean of its divisors is an integer number (260272755617275).

Almost surely, 2^{520545511234549} is an apocalyptic number.

It is an amenable number.

520545511234549 is a deficient number, since it is larger than the sum of its proper divisors (1).

520545511234549 is an equidigital number, since it uses as much as digits as its factorization.

520545511234549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600000, while the sum is 55.

The spelling of 520545511234549 in words is "five hundred twenty trillion, five hundred forty-five billion, five hundred eleven million, two hundred thirty-four thousand, five hundred forty-nine".