171271322662489 has 45 divisors (see below), whose sum is σ = 210889166577567. Its totient is φ = 139067571196512.

The previous prime is 171271322662487. The next prime is 171271322662549. The reversal of 171271322662489 is 984266223172171.

The square root of 171271322662489 is 13087067.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 5438946944025 + 165832375718464 = 2332155^2 + 12877592^2 .

It is not a de Polignac number, because 171271322662489 - 2¹ = 171271322662487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (171271322662483) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 12184052349 + ... + 12184066405.

Almost surely, 2^{171271322662489} is an apocalyptic number.

171271322662489 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

171271322662489 is the 13087067-th square number.

171271322662489 is the 6543534-th centered octagonal number.

It is an amenable number.

171271322662489 is a deficient number, since it is larger than the sum of its proper divisors (39617843915078).

171271322662489 is an frugal number, since it uses more digits than its factorization.

171271322662489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28180 (or 14083 counting only the distinct ones).

The product of its digits is 24385536, while the sum is 61.

The spelling of 171271322662489 in words is "one hundred seventy-one trillion, two hundred seventy-one billion, three hundred twenty-two million, six hundred sixty-two thousand, four hundred eighty-nine".