520573505369 has 2 divisors, whose sum is σ = 520573505370. Its totient is φ = 520573505368.

The previous prime is 520573505323. The next prime is 520573505401. The reversal of 520573505369 is 963505375025.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 414688345369 + 105885160000 = 643963^2 + 325400^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-520573505369 is a prime.

It is a super-2 number, since 2×520573505369² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (520573504369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260286752684 + 260286752685.

It is an arithmetic number, because the mean of its divisors is an integer number (260286752685).

Almost surely, 2^520573505369 is an apocalyptic number.

It is an amenable number.

520573505369 is a deficient number, since it is larger than the sum of its proper divisors (1).

520573505369 is an equidigital number, since it uses as much as digits as its factorization.

520573505369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4252500, while the sum is 50.

The spelling of 520573505369 in words is "five hundred twenty billion, five hundred seventy-three million, five hundred five thousand, three hundred sixty-nine".