171664542 has 48 divisors (see below), whose sum is σ = 443765520. Its totient is φ = 49046256.

The previous prime is 171664531. The next prime is 171664547. The reversal of 171664542 is 245466171.

171664542 is a `hidden beast` number, since 1 + 7 + 1 + 6 + 645 + 4 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 171664497 and 171664506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171664547) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29793 + ... + 35084.

It is an arithmetic number, because the mean of its divisors is an integer number (9245115).

Almost surely, 2^171664542 is an apocalyptic number.

171664542 is an abundant number, since it is smaller than the sum of its proper divisors (272100978).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

171664542 is a wasteful number, since it uses less digits than its factorization.

171664542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64902 (or 64889 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 171664542 is about 13102.0815903428. The cubic root of 171664542 is about 555.7679944855.

The spelling of 171664542 in words is "one hundred seventy-one million, six hundred sixty-four thousand, five hundred forty-two".