8721600008 has 16 divisors (see below), whose sum is σ = 17839636560. Its totient is φ = 3964363600.

The previous prime is 8721599903. The next prime is 8721600031. The reversal of 8721600008 is 8000061278.

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 in 3 ways as a sum of consecutive naturals, for example, 49554458 + ... + 49554633.

It is an arithmetic number, because the mean of its divisors is an integer number (1114977285).

Almost surely, 2^8721600008 is an apocalyptic number.

8721600008 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

8721600008 is an abundant number, since it is smaller than the sum of its proper divisors (9118036552).

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

8721600008 is a wasteful number, since it uses less digits than its factorization.

8721600008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99109108 (or 99109104 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 8721600008 is about 93389.5069480506. The cubic root of 8721600008 is about 2058.4108150603.

The spelling of 8721600008 in words is "eight billion, seven hundred twenty-one million, six hundred thousand, eight".