172168647017 has 2 divisors, whose sum is σ = 172168647018. Its totient is φ = 172168647016.

The previous prime is 172168646977. The next prime is 172168647023. The reversal of 172168647017 is 710746861271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 167232741481 + 4935905536 = 408941^2 + 70256^2 .

It is a cyclic number.

It is not a de Polignac number, because 172168647017 - 2³⁴ = 154988777833 is a prime.

It is not a weakly prime, because it can be changed into another prime (172168647817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86084323508 + 86084323509.

It is an arithmetic number, because the mean of its divisors is an integer number (86084323509).

Almost surely, 2^172168647017 is an apocalyptic number.

It is an amenable number.

172168647017 is a deficient number, since it is larger than the sum of its proper divisors (1).

172168647017 is an equidigital number, since it uses as much as digits as its factorization.

172168647017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 790272, while the sum is 50.

The spelling of 172168647017 in words is "one hundred seventy-two billion, one hundred sixty-eight million, six hundred forty-seven thousand, seventeen".