520840815957323 has 2 divisors, whose sum is σ = 520840815957324. Its totient is φ = 520840815957322.

The previous prime is 520840815957313. The next prime is 520840815957337. The reversal of 520840815957323 is 323759518048025.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 520840815957323 - 2¹⁰ = 520840815956299 is a prime.

It is not a weakly prime, because it can be changed into another prime (520840815957313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260420407978661 + 260420407978662.

It is an arithmetic number, because the mean of its divisors is an integer number (260420407978662).

Almost surely, 2^{520840815957323} is an apocalyptic number.

520840815957323 is a deficient number, since it is larger than the sum of its proper divisors (1).

520840815957323 is an equidigital number, since it uses as much as digits as its factorization.

520840815957323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576000, while the sum is 62.

The spelling of 520840815957323 in words is "five hundred twenty trillion, eight hundred forty billion, eight hundred fifteen million, nine hundred fifty-seven thousand, three hundred twenty-three".