16404328889 has 8 divisors (see below), whose sum is σ = 18596000640. Its totient is φ = 14345485776.

The previous prime is 16404328873. The next prime is 16404328933. The reversal of 16404328889 is 98882340461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16404328889 - 2⁴ = 16404328873 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16404328889.

It is not an unprimeable number, because it can be changed into a prime (16404328849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33206897 + ... + 33207390.

It is an arithmetic number, because the mean of its divisors is an integer number (2324500080).

Almost surely, 2^16404328889 is an apocalyptic number.

16404328889 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

16404328889 is a deficient number, since it is larger than the sum of its proper divisors (2191671751).

16404328889 is a wasteful number, since it uses less digits than its factorization.

16404328889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66414319.

The product of its (nonzero) digits is 2654208, while the sum is 53.

The spelling of 16404328889 in words is "sixteen billion, four hundred four million, three hundred twenty-eight thousand, eight hundred eighty-nine".