12154440244 has 6 divisors (see below), whose sum is σ = 21270270434. Its totient is φ = 6077220120.

The previous prime is 12154440187. The next prime is 12154440251. The reversal of 12154440244 is 44204445121.

It can be written as a sum of positive squares in only one way, i.e., 7932039844 + 4222400400 = 89062^2 + 64980^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1519305027 + ... + 1519305034.

Almost surely, 2^12154440244 is an apocalyptic number.

It is an amenable number.

12154440244 is a deficient number, since it is larger than the sum of its proper divisors (9115830190).

12154440244 is a wasteful number, since it uses less digits than its factorization.

12154440244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3038610065 (or 3038610063 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 31.

Adding to 12154440244 its reverse (44204445121), we get a palindrome (56358885365).

The spelling of 12154440244 in words is "twelve billion, one hundred fifty-four million, four hundred forty thousand, two hundred forty-four".