12215606144 has 32 divisors (see below), whose sum is σ = 27812319600. Its totient is φ = 5235259392.

The previous prime is 12215606131. The next prime is 12215606159. The reversal of 12215606144 is 44160651221.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 12215606144.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6815849 + ... + 6817640.

Almost surely, 2^12215606144 is an apocalyptic number.

12215606144 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

12215606144 is an abundant number, since it is smaller than the sum of its proper divisors (15596713456).

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

12215606144 is an equidigital number, since it uses as much as digits as its factorization.

12215606144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13633510 (or 13633498 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The spelling of 12215606144 in words is "twelve billion, two hundred fifteen million, six hundred six thousand, one hundred forty-four".