172145366269 has 2 divisors, whose sum is σ = 172145366270. Its totient is φ = 172145366268.

The previous prime is 172145366201. The next prime is 172145366317. The reversal of 172145366269 is 962663541271.

172145366269 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 can be written as a sum of positive squares in only one way, i.e., 157410562500 + 14734803769 = 396750^2 + 121387^2 .

It is a cyclic number.

It is not a de Polignac number, because 172145366269 - 2²⁷ = 172011148541 is a prime.

It is a super-2 number, since 2×172145366269² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172145367269) 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, 86072683134 + 86072683135.

It is an arithmetic number, because the mean of its divisors is an integer number (86072683135).

Almost surely, 2^172145366269 is an apocalyptic number.

It is an amenable number.

172145366269 is a deficient number, since it is larger than the sum of its proper divisors (1).

172145366269 is an equidigital number, since it uses as much as digits as its factorization.

172145366269 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3265920, while the sum is 52.

The spelling of 172145366269 in words is "one hundred seventy-two billion, one hundred forty-five million, three hundred sixty-six thousand, two hundred sixty-nine".