520020526064 has 80 divisors (see below), whose sum is σ = 1110708910080. Its totient is φ = 234355971840.

The previous prime is 520020526043. The next prime is 520020526097. The reversal of 520020526064 is 460625020025.

It is a self number, because there is not a number n which added to its sum of digits gives 520020526064.

It is a congruent number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 4151747 + ... + 4275165.

It is an arithmetic number, because the mean of its divisors is an integer number (13883861376).

Almost surely, 2^520020526064 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 520020526064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (555354455040).

520020526064 is an abundant number, since it is smaller than the sum of its proper divisors (590688384016).

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

520020526064 is a wasteful number, since it uses less digits than its factorization.

520020526064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123918 (or 123912 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 32.

Adding to 520020526064 its reverse (460625020025), we get a palindrome (980645546089).

The spelling of 520020526064 in words is "five hundred twenty billion, twenty million, five hundred twenty-six thousand, sixty-four".