164444445901 has 2 divisors, whose sum is σ = 164444445902. Its totient is φ = 164444445900.

The previous prime is 164444445889. The next prime is 164444445959. The reversal of 164444445901 is 109544444461.

164444445901 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 150157025001 + 14287420900 = 387501^2 + 119530^2 .

It is a cyclic number.

It is not a de Polignac number, because 164444445901 - 2¹¹ = 164444443853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164444445401) by changing a digit.

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 as a sum of consecutive naturals, namely, 82222222950 + 82222222951.

It is an arithmetic number, because the mean of its divisors is an integer number (82222222951).

Almost surely, 2^164444445901 is an apocalyptic number.

It is an amenable number.

164444445901 is a deficient number, since it is larger than the sum of its proper divisors (1).

164444445901 is an equidigital number, since it uses as much as digits as its factorization.

164444445901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1105920, while the sum is 46.

The spelling of 164444445901 in words is "one hundred sixty-four billion, four hundred forty-four million, four hundred forty-five thousand, nine hundred one".