16609881804 has 24 divisors (see below), whose sum is σ = 38765041728. Its totient is φ = 5535391440.

The previous prime is 16609881797. The next prime is 16609881853. The reversal of 16609881804 is 40818890661.

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 7 ways as a sum of consecutive naturals, for example, 97642 + ... + 206769.

It is an arithmetic number, because the mean of its divisors is an integer number (1615210072).

Almost surely, 2^16609881804 is an apocalyptic number.

It is an amenable number.

16609881804 is an abundant number, since it is smaller than the sum of its proper divisors (22155159924).

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

16609881804 is a wasteful number, since it uses less digits than its factorization.

16609881804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308965 (or 308963 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 51.

The spelling of 16609881804 in words is "sixteen billion, six hundred nine million, eight hundred eighty-one thousand, eight hundred four".