172539168 has 48 divisors (see below), whose sum is σ = 461474496. Its totient is φ = 56426240.

The previous prime is 172539167. The next prime is 172539173. The reversal of 172539168 is 861935271.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (172539161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11868 + ... + 22043.

It is an arithmetic number, because the mean of its divisors is an integer number (9614052).

Almost surely, 2^172539168 is an apocalyptic number.

It is an amenable number.

172539168 is an abundant number, since it is smaller than the sum of its proper divisors (288935328).

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

172539168 is a wasteful number, since it uses less digits than its factorization.

172539168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33977 (or 33969 counting only the distinct ones).

The product of its digits is 90720, while the sum is 42.

The square root of 172539168 is about 13135.4165522072. The cubic root of 172539168 is about 556.7102700894.

The spelling of 172539168 in words is "one hundred seventy-two million, five hundred thirty-nine thousand, one hundred sixty-eight".