8521612008 has 64 divisors (see below), whose sum is σ = 26220351360. Its totient is φ = 2247457536.

The previous prime is 8521611983. The next prime is 8521612019. The reversal of 8521612008 is 8002161258.

It is a self number, because there is not a number n which added to its sum of digits gives 8521612008.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1948735 + ... + 1953102.

It is an arithmetic number, because the mean of its divisors is an integer number (409692990).

Almost surely, 2^8521612008 is an apocalyptic number.

It is an amenable number.

8521612008 is an abundant number, since it is smaller than the sum of its proper divisors (17698739352).

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

8521612008 is a wasteful number, since it uses less digits than its factorization.

8521612008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3901866 (or 3901862 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 33.

The square root of 8521612008 is about 92312.5777345644. The cubic root of 8521612008 is about 2042.5557490999. Note that the first 3 decimals are identical.

The spelling of 8521612008 in words is "eight billion, five hundred twenty-one million, six hundred twelve thousand, eight".