520405545479 has 2 divisors, whose sum is σ = 520405545480. Its totient is φ = 520405545478.

The previous prime is 520405545463. The next prime is 520405545509. The reversal of 520405545479 is 974545504025.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 520405545479 - 2⁴ = 520405545463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (520405545409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260202772739 + 260202772740.

It is an arithmetic number, because the mean of its divisors is an integer number (260202772740).

Almost surely, 2^520405545479 is an apocalyptic number.

520405545479 is a deficient number, since it is larger than the sum of its proper divisors (1).

520405545479 is an equidigital number, since it uses as much as digits as its factorization.

520405545479 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040000, while the sum is 50.

The spelling of 520405545479 in words is "five hundred twenty billion, four hundred five million, five hundred forty-five thousand, four hundred seventy-nine".