171546221089 has 4 divisors (see below), whose sum is σ = 173962365120. Its totient is φ = 169130077060.

The previous prime is 171546221081. The next prime is 171546221123. The reversal of 171546221089 is 980122645171.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 980122645171 = 15377 ⋅63739523.

It is a cyclic number.

It is not a de Polignac number, because 171546221089 - 2³ = 171546221081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (171546221081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1208071909 + ... + 1208072050.

It is an arithmetic number, because the mean of its divisors is an integer number (43490591280).

Almost surely, 2^171546221089 is an apocalyptic number.

It is an amenable number.

171546221089 is a deficient number, since it is larger than the sum of its proper divisors (2416144031).

171546221089 is an equidigital number, since it uses as much as digits as its factorization.

171546221089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2416144030.

The product of its (nonzero) digits is 241920, while the sum is 46.

The spelling of 171546221089 in words is "one hundred seventy-one billion, five hundred forty-six million, two hundred twenty-one thousand, eighty-nine".