3172644161 has 4 divisors (see below), whose sum is σ = 3200720772. Its totient is φ = 3144567552.

The previous prime is 3172644157. The next prime is 3172644197. The reversal of 3172644161 is 1614462713.

3172644161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 922944400 + 2249699761 = 30380^2 + 47431^2 .

It is a cyclic number.

It is not a de Polignac number, because 3172644161 - 2² = 3172644157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3172644121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14038136 + ... + 14038361.

It is an arithmetic number, because the mean of its divisors is an integer number (800180193).

Almost surely, 2^3172644161 is an apocalyptic number.

It is an amenable number.

3172644161 is a deficient number, since it is larger than the sum of its proper divisors (28076611).

3172644161 is a wasteful number, since it uses less digits than its factorization.

3172644161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28076610.

The product of its digits is 24192, while the sum is 35.

The square root of 3172644161 is about 56326.2297779640. The cubic root of 3172644161 is about 1469.4014193340.

The spelling of 3172644161 in words is "three billion, one hundred seventy-two million, six hundred forty-four thousand, one hundred sixty-one".