16604365905 has 32 divisors (see below), whose sum is σ = 31072502400. Its totient is φ = 8389573056.

The previous prime is 16604365871. The next prime is 16604365931. The reversal of 16604365905 is 50956340661.

16604365905 is a `hidden beast` number, since 1 + 6 + 604 + 36 + 5 + 9 + 0 + 5 = 666.

16604365905 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 16604365905 - 2⁷ = 16604365777 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3234154 + ... + 3239283.

It is an arithmetic number, because the mean of its divisors is an integer number (971015700).

Almost surely, 2^16604365905 is an apocalyptic number.

16604365905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16604365905 is a deficient number, since it is larger than the sum of its proper divisors (14468136495).

16604365905 is a wasteful number, since it uses less digits than its factorization.

16604365905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6473470 (or 6473464 counting only the distinct ones).

The product of its (nonzero) digits is 583200, while the sum is 45.

The spelling of 16604365905 in words is "sixteen billion, six hundred four million, three hundred sixty-five thousand, nine hundred five".