12256361745220 has 12 divisors (see below), whose sum is σ = 25738359665004. Its totient is φ = 4902544698080.

The previous prime is 12256361745209. The next prime is 12256361745227. The reversal of 12256361745220 is 2254716365221.

It can be written as a sum of positive squares in 2 ways, for example, as 6335208456256 + 5921153288964 = 2516984^2 + 2433342^2 .

It is not an unprimeable number, because it can be changed into a prime (12256361745227) 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, 306409043611 + ... + 306409043650.

It is an arithmetic number, because the mean of its divisors is an integer number (2144863305417).

Almost surely, 2^{12256361745220} is an apocalyptic number.

12256361745220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12256361745220 is an abundant number, since it is smaller than the sum of its proper divisors (13481997919784).

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

12256361745220 is a wasteful number, since it uses less digits than its factorization.

12256361745220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 612818087270 (or 612818087268 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 46.

The spelling of 12256361745220 in words is "twelve trillion, two hundred fifty-six billion, three hundred sixty-one million, seven hundred forty-five thousand, two hundred twenty".