32187172161 has 16 divisors (see below), whose sum is σ = 43471036160. Its totient is φ = 21180856320.

The previous prime is 32187172159. The next prime is 32187172177. The reversal of 32187172161 is 16127178123.

It is a happy number.

It is not a de Polignac number, because 32187172161 - 2¹ = 32187172159 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (32187172561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 993921 + ... + 1025793.

It is an arithmetic number, because the mean of its divisors is an integer number (2716939760).

Almost surely, 2^32187172161 is an apocalyptic number.

It is an amenable number.

32187172161 is a deficient number, since it is larger than the sum of its proper divisors (11283863999).

32187172161 is a wasteful number, since it uses less digits than its factorization.

32187172161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36216.

The product of its digits is 28224, while the sum is 39.

The spelling of 32187172161 in words is "thirty-two billion, one hundred eighty-seven million, one hundred seventy-two thousand, one hundred sixty-one".