12115664 has 80 divisors (see below), whose sum is σ = 27748224. Its totient is φ = 5068800.

The previous prime is 12115661. The next prime is 12115669. The reversal of 12115664 is 46651121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12115661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 165932 + ... + 166004.

Almost surely, 2^12115664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12115664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13874112).

12115664 is an abundant number, since it is smaller than the sum of its proper divisors (15632560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12115664 is a wasteful number, since it uses less digits than its factorization.

12115664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156 (or 150 counting only the distinct ones).

The product of its digits is 1440, while the sum is 26.

The square root of 12115664 is about 3480.7562396698. The cubic root of 12115664 is about 229.6760657211.

Adding to 12115664 its reverse (46651121), we get a palindrome (58766785).

The spelling of 12115664 in words is "twelve million, one hundred fifteen thousand, six hundred sixty-four".