12162203256 has 64 divisors (see below), whose sum is σ = 34838668800. Its totient is φ = 3465963648.

The previous prime is 12162203237. The next prime is 12162203279. The reversal of 12162203256 is 65230226121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27700 + ... + 158403.

It is an arithmetic number, because the mean of its divisors is an integer number (544354200).

Almost surely, 2^12162203256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12162203256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17419334400).

12162203256 is an abundant number, since it is smaller than the sum of its proper divisors (22676465544).

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

12162203256 is a wasteful number, since it uses less digits than its factorization.

12162203256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186508 (or 186504 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

Adding to 12162203256 its reverse (65230226121), we get a palindrome (77392429377).

The spelling of 12162203256 in words is "twelve billion, one hundred sixty-two million, two hundred three thousand, two hundred fifty-six".