8521808564008 has 32 divisors (see below), whose sum is σ = 16054756502400. Its totient is φ = 4240587362368.

The previous prime is 8521808563997. The next prime is 8521808564011. The reversal of 8521808564008 is 8004658081258.

It is a self number, because there is not a number n which added to its sum of digits gives 8521808564008.

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, 1504891 + ... + 4394122.

It is an arithmetic number, because the mean of its divisors is an integer number (501711140700).

Almost surely, 2^{8521808564008} is an apocalyptic number.

It is an amenable number.

8521808564008 is a deficient number, since it is larger than the sum of its proper divisors (7532947938392).

8521808564008 is a wasteful number, since it uses less digits than its factorization.

8521808564008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5899881 (or 5899877 counting only the distinct ones).

The product of its (nonzero) digits is 4915200, while the sum is 55.

The spelling of 8521808564008 in words is "eight trillion, five hundred twenty-one billion, eight hundred eight million, five hundred sixty-four thousand, eight".