12655616 has 44 divisors (see below), whose sum is σ = 26823888. Its totient is φ = 5947392.

The previous prime is 12655607. The next prime is 12655619. The reversal of 12655616 is 61655621.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12655619) 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, 17045 + ... + 17771.

Almost surely, 2^12655616 is an apocalyptic number.

12655616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12655616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13411944).

12655616 is an abundant number, since it is smaller than the sum of its proper divisors (14168272).

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

12655616 is an equidigital number, since it uses as much as digits as its factorization.

12655616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764 (or 746 counting only the distinct ones).

The product of its digits is 10800, while the sum is 32.

The square root of 12655616 is about 3557.4732606163. The cubic root of 12655616 is about 233.0385465524.

The spelling of 12655616 in words is "twelve million, six hundred fifty-five thousand, six hundred sixteen".