172061647722269 has 2 divisors, whose sum is σ = 172061647722270. Its totient is φ = 172061647722268.

The previous prime is 172061647722221. The next prime is 172061647722281. The reversal of 172061647722269 is 962227746160271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 149656931899225 + 22404715823044 = 12233435^2 + 4733362^2 .

It is a cyclic number.

It is not a de Polignac number, because 172061647722269 - 2¹² = 172061647718173 is a prime.

It is a super-2 number, since 2×172061647722269² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172061647722299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86030823861134 + 86030823861135.

It is an arithmetic number, because the mean of its divisors is an integer number (86030823861135).

Almost surely, 2^{172061647722269} is an apocalyptic number.

It is an amenable number.

172061647722269 is a deficient number, since it is larger than the sum of its proper divisors (1).

172061647722269 is an equidigital number, since it uses as much as digits as its factorization.

172061647722269 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42674688, while the sum is 62.

The spelling of 172061647722269 in words is "one hundred seventy-two trillion, sixty-one billion, six hundred forty-seven million, seven hundred twenty-two thousand, two hundred sixty-nine".