172716555173 has 2 divisors, whose sum is σ = 172716555174. Its totient is φ = 172716555172.

The previous prime is 172716555163. The next prime is 172716555197. The reversal of 172716555173 is 371555617271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 160158439204 + 12558115969 = 400198^2 + 112063^2 .

It is an emirp because it is prime and its reverse (371555617271) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 172716555173 - 2¹⁴ = 172716538789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172716555163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86358277586 + 86358277587.

It is an arithmetic number, because the mean of its divisors is an integer number (86358277587).

Almost surely, 2^172716555173 is an apocalyptic number.

It is an amenable number.

172716555173 is a deficient number, since it is larger than the sum of its proper divisors (1).

172716555173 is an equidigital number, since it uses as much as digits as its factorization.

172716555173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1543500, while the sum is 50.

The spelling of 172716555173 in words is "one hundred seventy-two billion, seven hundred sixteen million, five hundred fifty-five thousand, one hundred seventy-three".