520664424466013 has 2 divisors, whose sum is σ = 520664424466014. Its totient is φ = 520664424466012.

The previous prime is 520664424465979. The next prime is 520664424466033. The reversal of 520664424466013 is 310664424466025.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 446409202046404 + 74255222419609 = 21128398^2 + 8617147^2 .

It is a cyclic number.

It is not a de Polignac number, because 520664424466013 - 2⁶ = 520664424465949 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (520664424466033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260332212233006 + 260332212233007.

It is an arithmetic number, because the mean of its divisors is an integer number (260332212233007).

Almost surely, 2^{520664424466013} is an apocalyptic number.

It is an amenable number.

520664424466013 is a deficient number, since it is larger than the sum of its proper divisors (1).

520664424466013 is an equidigital number, since it uses as much as digits as its factorization.

520664424466013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19906560, while the sum is 53.

The spelling of 520664424466013 in words is "five hundred twenty trillion, six hundred sixty-four billion, four hundred twenty-four million, four hundred sixty-six thousand, thirteen".