12644048220 has 192 divisors, whose sum is σ = 37061781120. Its totient is φ = 3218227200.

The previous prime is 12644048203. The next prime is 12644048233. The reversal of 12644048220 is 2284044621.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 32503786 + ... + 32504174.

It is an arithmetic number, because the mean of its divisors is an integer number (193030110).

Almost surely, 2^12644048220 is an apocalyptic number.

12644048220 is a gapful number since it is divisible by the number (10) 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 12644048220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18530890560).

12644048220 is an abundant number, since it is smaller than the sum of its proper divisors (24417732900).

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

12644048220 is a wasteful number, since it uses less digits than its factorization.

12644048220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696 (or 694 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 33.

The spelling of 12644048220 in words is "twelve billion, six hundred forty-four million, forty-eight thousand, two hundred twenty".