12144425618 has 16 divisors (see below), whose sum is σ = 19988069976. Its totient is φ = 5499361920.

The previous prime is 12144425617. The next prime is 12144425633. The reversal of 12144425618 is 81652444121.

It can be written as a sum of positive squares in 4 ways, for example, as 7260232849 + 4884192769 = 85207^2 + 69887^2 .

It is a super-2 number, since 2×12144425618² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12144425611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4405163 + ... + 4407918.

Almost surely, 2^12144425618 is an apocalyptic number.

12144425618 is a deficient number, since it is larger than the sum of its proper divisors (7843644358).

12144425618 is a wasteful number, since it uses less digits than its factorization.

12144425618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8813149.

The product of its digits is 61440, while the sum is 38.

Adding to 12144425618 its reverse (81652444121), we get a palindrome (93796869739).

The spelling of 12144425618 in words is "twelve billion, one hundred forty-four million, four hundred twenty-five thousand, six hundred eighteen".