12223645840 has 120 divisors (see below), whose sum is σ = 33139307520. Its totient is φ = 4180909824.

The previous prime is 12223645829. The next prime is 12223645871. The reversal of 12223645840 is 4854632221.

It is a self number, because there is not a number n which added to its sum of digits gives 12223645840.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1733041 + ... + 1740079.

It is an arithmetic number, because the mean of its divisors is an integer number (276160896).

Almost surely, 2^12223645840 is an apocalyptic number.

12223645840 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 12223645840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16569653760).

12223645840 is an abundant number, since it is smaller than the sum of its proper divisors (20915661680).

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

12223645840 is a wasteful number, since it uses less digits than its factorization.

12223645840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7509 (or 7496 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 37.

The spelling of 12223645840 in words is "twelve billion, two hundred twenty-three million, six hundred forty-five thousand, eight hundred forty".