12224557620 has 144 divisors (see below), whose sum is σ = 40907280960. Its totient is φ = 2930188800.

The previous prime is 12224557571. The next prime is 12224557621. The reversal of 12224557620 is 2675542221.

12224557620 is a `hidden beast` number, since 1 + 2 + 2 + 24 + 5 + 5 + 7 + 620 = 666.

12224557620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12224557621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 141535 + ... + 210905.

It is an arithmetic number, because the mean of its divisors is an integer number (284078340).

Almost surely, 2^12224557620 is an apocalyptic number.

12224557620 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 12224557620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20453640480).

12224557620 is an abundant number, since it is smaller than the sum of its proper divisors (28682723340).

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

12224557620 is a wasteful number, since it uses less digits than its factorization.

12224557620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69486 (or 69481 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 36.

The spelling of 12224557620 in words is "twelve billion, two hundred twenty-four million, five hundred fifty-seven thousand, six hundred twenty".