6520520430 has 96 divisors (see below), whose sum is σ = 17380677600. Its totient is φ = 1695133440.

The previous prime is 6520520429. The next prime is 6520520437. The reversal of 6520520430 is 340250256.

6520520430 is a `hidden beast` number, since 6 + 5 + 205 + 20 + 430 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 6520520394 and 6520520403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6520520437) 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 in 47 ways as a sum of consecutive naturals, for example, 2556796 + ... + 2559344.

It is an arithmetic number, because the mean of its divisors is an integer number (181048725).

Almost surely, 2^6520520430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6520520430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8690338800).

6520520430 is an abundant number, since it is smaller than the sum of its proper divisors (10860157170).

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

6520520430 is a wasteful number, since it uses less digits than its factorization.

6520520430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3266 (or 3263 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 6520520430 is about 80749.7395042238. The cubic root of 6520520430 is about 1868.2174315926.

Adding to 6520520430 its reverse (340250256), we get a palindrome (6860770686).

The spelling of 6520520430 in words is "six billion, five hundred twenty million, five hundred twenty thousand, four hundred thirty".