161173644145271 has 2 divisors, whose sum is σ = 161173644145272. Its totient is φ = 161173644145270.

The previous prime is 161173644145231. The next prime is 161173644145289. The reversal of 161173644145271 is 172541446371161.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161173644145271 - 2⁴² = 156775597634167 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161173644145201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80586822072635 + 80586822072636.

It is an arithmetic number, because the mean of its divisors is an integer number (80586822072636).

Almost surely, 2^{161173644145271} is an apocalyptic number.

161173644145271 is a deficient number, since it is larger than the sum of its proper divisors (1).

161173644145271 is an equidigital number, since it uses as much as digits as its factorization.

161173644145271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3386880, while the sum is 53.

The spelling of 161173644145271 in words is "one hundred sixty-one trillion, one hundred seventy-three billion, six hundred forty-four million, one hundred forty-five thousand, two hundred seventy-one".