12161646164 has 24 divisors (see below), whose sum is σ = 21653049600. Its totient is φ = 5975150720.

The previous prime is 12161646137. The next prime is 12161646181. The reversal of 12161646164 is 46164616121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 601532 + ... + 621420.

It is an arithmetic number, because the mean of its divisors is an integer number (902210400).

Almost surely, 2^12161646164 is an apocalyptic number.

It is an amenable number.

12161646164 is a deficient number, since it is larger than the sum of its proper divisors (9491403436).

12161646164 is a wasteful number, since it uses less digits than its factorization.

12161646164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22543 (or 22541 counting only the distinct ones).

The product of its digits is 41472, while the sum is 38.

The spelling of 12161646164 in words is "twelve billion, one hundred sixty-one million, six hundred forty-six thousand, one hundred sixty-four".