6520406252 has 48 divisors (see below), whose sum is σ = 12383938560. Its totient is φ = 2995641792.

The previous prime is 6520406239. The next prime is 6520406267. The reversal of 6520406252 is 2526040256.

It is a super-2 number, since 2×6520406252² = 85031395382241375008, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 256793 + ... + 281039.

It is an arithmetic number, because the mean of its divisors is an integer number (257998720).

Almost surely, 2^6520406252 is an apocalyptic number.

It is an amenable number.

6520406252 is a deficient number, since it is larger than the sum of its proper divisors (5863532308).

6520406252 is a wasteful number, since it uses less digits than its factorization.

6520406252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24390 (or 24388 counting only the distinct ones).

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

The square root of 6520406252 is about 80749.0325143280. The cubic root of 6520406252 is about 1868.2065270143.

The spelling of 6520406252 in words is "six billion, five hundred twenty million, four hundred six thousand, two hundred fifty-two".