164721905063 has 2 divisors, whose sum is σ = 164721905064. Its totient is φ = 164721905062.

The previous prime is 164721905003. The next prime is 164721905077. The reversal of 164721905063 is 360509127461.

164721905063 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 164721905063 - 2¹⁴ = 164721888679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (164721905003) 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, 82360952531 + 82360952532.

It is an arithmetic number, because the mean of its divisors is an integer number (82360952532).

Almost surely, 2^164721905063 is an apocalyptic number.

164721905063 is a deficient number, since it is larger than the sum of its proper divisors (1).

164721905063 is an equidigital number, since it uses as much as digits as its factorization.

164721905063 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 272160, while the sum is 44.

The spelling of 164721905063 in words is "one hundred sixty-four billion, seven hundred twenty-one million, nine hundred five thousand, sixty-three".