172543668 has 48 divisors (see below), whose sum is σ = 440584704. Its totient is φ = 52121440.

The previous prime is 172543667. The next prime is 172543669. The reversal of 172543668 is 866345271.

It is an interprime number because it is at equal distance from previous prime (172543667) and next prime (172543669).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172543661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43921 + ... + 47687.

It is an arithmetic number, because the mean of its divisors is an integer number (9178848).

Almost surely, 2^172543668 is an apocalyptic number.

It is an amenable number.

172543668 is an abundant number, since it is smaller than the sum of its proper divisors (268041036).

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

172543668 is a wasteful number, since it uses less digits than its factorization.

172543668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4132 (or 4130 counting only the distinct ones).

The product of its digits is 241920, while the sum is 42.

The square root of 172543668 is about 13135.5878437168. The cubic root of 172543668 is about 556.7151099072.

The spelling of 172543668 in words is "one hundred seventy-two million, five hundred forty-three thousand, six hundred sixty-eight".