164398393805 has 32 divisors (see below), whose sum is σ = 200137470720. Its totient is φ = 129627164160.

The previous prime is 164398393793. The next prime is 164398393837. The reversal of 164398393805 is 508393893461.

164398393805 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 164398393805 - 2¹⁴ = 164398377421 is a prime.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 140390870 + ... + 140392040.

It is an arithmetic number, because the mean of its divisors is an integer number (6254295960).

Almost surely, 2^164398393805 is an apocalyptic number.

It is an amenable number.

164398393805 is a deficient number, since it is larger than the sum of its proper divisors (35739076915).

164398393805 is a wasteful number, since it uses less digits than its factorization.

164398393805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2421.

The product of its (nonzero) digits is 16796160, while the sum is 59.

The spelling of 164398393805 in words is "one hundred sixty-four billion, three hundred ninety-eight million, three hundred ninety-three thousand, eight hundred five".