520455343243660 has 72 divisors (see below), whose sum is σ = 1216555517701440. Its totient is φ = 186860836631040.

The previous prime is 520455343243637. The next prime is 520455343243699. The reversal of 520455343243660 is 66342343554025.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 520455343243598 and 520455343243607.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1360974589 + ... + 1361356948.

It is an arithmetic number, because the mean of its divisors is an integer number (16896604412520).

Almost surely, 2^{520455343243660} is an apocalyptic number.

It is an amenable number.

520455343243660 is an abundant number, since it is smaller than the sum of its proper divisors (696100174457780).

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

520455343243660 is a wasteful number, since it uses less digits than its factorization.

520455343243660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2722331647 (or 2722331634 counting only the distinct ones).

The product of its (nonzero) digits is 31104000, while the sum is 52.

Adding to 520455343243660 its reverse (66342343554025), we get a palindrome (586797686797685).

The spelling of 520455343243660 in words is "five hundred twenty trillion, four hundred fifty-five billion, three hundred forty-three million, two hundred forty-three thousand, six hundred sixty".