171037663489 has 81 divisors (see below), whose sum is σ = 225882255459. Its totient is φ = 129032904000.

The previous prime is 171037663451. The next prime is 171037663499. The reversal of 171037663489 is 984366730171.

The square root of 171037663489 is 413567.

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., 8241553089 + 162796110400 = 90783^2 + 403480^2 .

It is not a de Polignac number, because 171037663489 - 2⁷ = 171037663361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (171037663429) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 1305630954 + ... + 1305631084.

Almost surely, 2^171037663489 is an apocalyptic number.

171037663489 is the 413567-th square number.

171037663489 is the 206784-th centered octagonal number.

It is an amenable number.

171037663489 is a deficient number, since it is larger than the sum of its proper divisors (54844591970).

171037663489 is an equidigital number, since it uses as much as digits as its factorization.

171037663489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380 (or 190 counting only the distinct ones).

The product of its (nonzero) digits is 4572288, while the sum is 55.

The spelling of 171037663489 in words is "one hundred seventy-one billion, thirty-seven million, six hundred sixty-three thousand, four hundred eighty-nine".