32172664321 has 4 divisors (see below), whose sum is σ = 36768759232. Its totient is φ = 27576569412.

The previous prime is 32172664313. The next prime is 32172664327. The reversal of 32172664321 is 12346627123.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12346627123 = 2237 ⋅5519279.

It is not a de Polignac number, because 32172664321 - 2³ = 32172664313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (32172664327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2298047445 + ... + 2298047458.

It is an arithmetic number, because the mean of its divisors is an integer number (9192189808).

Almost surely, 2^32172664321 is an apocalyptic number.

It is an amenable number.

32172664321 is a deficient number, since it is larger than the sum of its proper divisors (4596094911).

32172664321 is an equidigital number, since it uses as much as digits as its factorization.

32172664321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4596094910.

The product of its digits is 72576, while the sum is 37.

The spelling of 32172664321 in words is "thirty-two billion, one hundred seventy-two million, six hundred sixty-four thousand, three hundred twenty-one".