172136446189 has 2 divisors, whose sum is σ = 172136446190. Its totient is φ = 172136446188.

The previous prime is 172136446129. The next prime is 172136446193. The reversal of 172136446189 is 981644631271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134007244900 + 38129201289 = 366070^2 + 195267^2 .

It is a cyclic number.

It is not a de Polignac number, because 172136446189 - 2¹³ = 172136437997 is a prime.

It is a super-2 number, since 2×172136446189² (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 (172136446129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86068223094 + 86068223095.

It is an arithmetic number, because the mean of its divisors is an integer number (86068223095).

Almost surely, 2^172136446189 is an apocalyptic number.

It is an amenable number.

172136446189 is a deficient number, since it is larger than the sum of its proper divisors (1).

172136446189 is an equidigital number, since it uses as much as digits as its factorization.

172136446189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1741824, while the sum is 52.

The spelling of 172136446189 in words is "one hundred seventy-two billion, one hundred thirty-six million, four hundred forty-six thousand, one hundred eighty-nine".