172664441181875 has 10 divisors (see below), whose sum is σ = 215761485701652. Its totient is φ = 138131552945000.

The previous prime is 172664441181871. The next prime is 172664441181901. The reversal of 172664441181875 is 578181144466271.

It is a happy number.

172664441181875 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 172664441181875 - 2² = 172664441181871 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172664441181871) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 138131552321 + ... + 138131553570.

Almost surely, 2^{172664441181875} is an apocalyptic number.

172664441181875 is a deficient number, since it is larger than the sum of its proper divisors (43097044519777).

172664441181875 is an frugal number, since it uses more digits than its factorization.

172664441181875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276263105911 (or 276263105896 counting only the distinct ones).

The product of its digits is 72253440, while the sum is 65.

The spelling of 172664441181875 in words is "one hundred seventy-two trillion, six hundred sixty-four billion, four hundred forty-one million, one hundred eighty-one thousand, eight hundred seventy-five".