6520020444 has 72 divisors (see below), whose sum is σ = 18843202560. Its totient is φ = 1862112672.

The previous prime is 6520020413. The next prime is 6520020491. The reversal of 6520020444 is 4440200256.

6520020444 is a `hidden beast` number, since 652 + 0 + 0 + 2 + 0 + 4 + 4 + 4 = 666.

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 23 ways as a sum of consecutive naturals, for example, 1024737 + ... + 1031079.

Almost surely, 2^6520020444 is an apocalyptic number.

It is an amenable number.

6520020444 is an abundant number, since it is smaller than the sum of its proper divisors (12323182116).

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

6520020444 is a wasteful number, since it uses less digits than its factorization.

6520020444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10439 (or 10434 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

The square root of 6520020444 is about 80746.6435463419. The cubic root of 6520020444 is about 1868.1696794514.

The spelling of 6520020444 in words is "six billion, five hundred twenty million, twenty thousand, four hundred forty-four".