520405386841 has 4 divisors (see below), whose sum is σ = 543031708032. Its totient is φ = 497779065652.

The previous prime is 520405386817. The next prime is 520405386863. The reversal of 520405386841 is 148683504025.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 520405386841 - 2¹⁹ = 520404862553 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 520405386791 and 520405386800.

It is not an unprimeable number, because it can be changed into a prime (520405386871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11313160561 + ... + 11313160606.

It is an arithmetic number, because the mean of its divisors is an integer number (135757927008).

Almost surely, 2^520405386841 is an apocalyptic number.

It is an amenable number.

520405386841 is a deficient number, since it is larger than the sum of its proper divisors (22626321191).

520405386841 is a wasteful number, since it uses less digits than its factorization.

520405386841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22626321190.

The product of its (nonzero) digits is 921600, while the sum is 46.

The spelling of 520405386841 in words is "five hundred twenty billion, four hundred five million, three hundred eighty-six thousand, eight hundred forty-one".