8520408646 has 16 divisors (see below), whose sum is σ = 12989183040. Its totient is φ = 4191071040.

The previous prime is 8520408607. The next prime is 8520408679. The reversal of 8520408646 is 6468040258.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53575 + ... + 141106.

It is an arithmetic number, because the mean of its divisors is an integer number (811823940).

Almost surely, 2^8520408646 is an apocalyptic number.

8520408646 is a deficient number, since it is larger than the sum of its proper divisors (4468774394).

8520408646 is a wasteful number, since it uses less digits than its factorization.

8520408646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195039.

The product of its (nonzero) digits is 368640, while the sum is 43.

The square root of 8520408646 is about 92306.0596385741. The cubic root of 8520408646 is about 2042.4595994640.

The spelling of 8520408646 in words is "eight billion, five hundred twenty million, four hundred eight thousand, six hundred forty-six".