129821804808 has 64 divisors (see below), whose sum is σ = 340071177600. Its totient is φ = 41220664320.

The previous prime is 129821804797. The next prime is 129821804837. The reversal of 129821804808 is 808408128921.

129821804808 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

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 15 ways as a sum of consecutive naturals, for example, 354903 + ... + 620966.

It is an arithmetic number, because the mean of its divisors is an integer number (5313612150).

Almost surely, 2^129821804808 is an apocalyptic number.

It is an amenable number.

129821804808 is an abundant number, since it is smaller than the sum of its proper divisors (210249372792).

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

129821804808 is a wasteful number, since it uses less digits than its factorization.

129821804808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 976142 (or 976138 counting only the distinct ones).

The product of its (nonzero) digits is 589824, while the sum is 51.

The spelling of 129821804808 in words is "one hundred twenty-nine billion, eight hundred twenty-one million, eight hundred four thousand, eight hundred eight".