3161664321 has 8 divisors (see below), whose sum is σ = 4215819840. Its totient is φ = 2107642512.

The previous prime is 3161664287. The next prime is 3161664323. The reversal of 3161664321 is 1234661613.

3161664321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3161664321 - 2⁷ = 3161664193 is a prime.

It is a super-2 number, since 2×3161664321² = 19992242557368782082, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (3161664323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55695 + ... + 97083.

It is an arithmetic number, because the mean of its divisors is an integer number (526977480).

Almost surely, 2^3161664321 is an apocalyptic number.

It is an amenable number.

3161664321 is a deficient number, since it is larger than the sum of its proper divisors (1054155519).

3161664321 is a wasteful number, since it uses less digits than its factorization.

3161664321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66855.

The product of its digits is 15552, while the sum is 33.

The square root of 3161664321 is about 56228.6788125063. The cubic root of 3161664321 is about 1467.7043658784.

The spelling of 3161664321 in words is "three billion, one hundred sixty-one million, six hundred sixty-four thousand, three hundred twenty-one".