520545511234540 has 48 divisors (see below), whose sum is σ = 1203463016854560. Its totient is φ = 187552677934080.

The previous prime is 520545511234513. The next prime is 520545511234549. The reversal of 520545511234540 is 45432115545025.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (520545511234549) 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 in 15 ways as a sum of consecutive naturals, for example, 10853718957 + ... + 10853766916.

It is an arithmetic number, because the mean of its divisors is an integer number (25072146184470).

Almost surely, 2^{520545511234540} is an apocalyptic number.

It is an amenable number.

520545511234540 is an abundant number, since it is smaller than the sum of its proper divisors (682917505620020).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

520545511234540 is a wasteful number, since it uses less digits than its factorization.

520545511234540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21707486002 (or 21707486000 counting only the distinct ones).

The product of its (nonzero) digits is 2400000, while the sum is 46.

Adding to 520545511234540 its reverse (45432115545025), we get a palindrome (565977626779565).

The spelling of 520545511234540 in words is "five hundred twenty trillion, five hundred forty-five billion, five hundred eleven million, two hundred thirty-four thousand, five hundred forty".