163021642073 has 2 divisors, whose sum is σ = 163021642074. Its totient is φ = 163021642072.

The previous prime is 163021641997. The next prime is 163021642093. The reversal of 163021642073 is 370246120361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144500337424 + 18521304649 = 380132^2 + 136093^2 .

It is a cyclic number.

It is not a de Polignac number, because 163021642073 - 2¹⁶ = 163021576537 is a prime.

It is not a weakly prime, because it can be changed into another prime (163021642093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81510821036 + 81510821037.

It is an arithmetic number, because the mean of its divisors is an integer number (81510821037).

Almost surely, 2^163021642073 is an apocalyptic number.

It is an amenable number.

163021642073 is a deficient number, since it is larger than the sum of its proper divisors (1).

163021642073 is an equidigital number, since it uses as much as digits as its factorization.

163021642073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 35.

The spelling of 163021642073 in words is "one hundred sixty-three billion, twenty-one million, six hundred forty-two thousand, seventy-three".