171664144 has 20 divisors (see below), whose sum is σ = 333466380. Its totient is φ = 85608320.

The previous prime is 171664123. The next prime is 171664177. The reversal of 171664144 is 441466171.

It can be written as a sum of positive squares in 2 ways, for example, as 122943744 + 48720400 = 11088^2 + 6980^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7567 + ... + 20014.

It is an arithmetic number, because the mean of its divisors is an integer number (16673319).

Almost surely, 2^171664144 is an apocalyptic number.

It is an amenable number.

171664144 is a deficient number, since it is larger than the sum of its proper divisors (161802236).

171664144 is a wasteful number, since it uses less digits than its factorization.

171664144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27978 (or 27972 counting only the distinct ones).

The product of its digits is 16128, while the sum is 34.

The square root of 171664144 is about 13102.0664019078. The cubic root of 171664144 is about 555.7675649737.

The spelling of 171664144 in words is "one hundred seventy-one million, six hundred sixty-four thousand, one hundred forty-four".