6520416424 has 8 divisors (see below), whose sum is σ = 12225780810. Its totient is φ = 3260208208.

The previous prime is 6520416389. The next prime is 6520416431. The reversal of 6520416424 is 4246140256.

It can be written as a sum of positive squares in only one way, i.e., 4240353924 + 2280062500 = 65118^2 + 47750^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×6520416424³ (a number of 30 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6520416424.

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 as a sum of consecutive naturals, namely, 407526019 + ... + 407526034.

Almost surely, 2^6520416424 is an apocalyptic number.

It is an amenable number.

6520416424 is a deficient number, since it is larger than the sum of its proper divisors (5705364386).

6520416424 is a wasteful number, since it uses less digits than its factorization.

6520416424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815052059 (or 815052055 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 34.

The square root of 6520416424 is about 80749.0954995782. The cubic root of 6520416424 is about 1868.2074984971.

The spelling of 6520416424 in words is "six billion, five hundred twenty million, four hundred sixteen thousand, four hundred twenty-four".