12405665144 has 32 divisors (see below), whose sum is σ = 23819832000. Its totient is φ = 6055475712.

The previous prime is 12405665143. The next prime is 12405665161. The reversal of 12405665144 is 44156650421.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12405665098 and 12405665107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12405665141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54029 + ... + 166524.

It is an arithmetic number, because the mean of its divisors is an integer number (744369750).

Almost surely, 2^12405665144 is an apocalyptic number.

It is an amenable number.

12405665144 is a deficient number, since it is larger than the sum of its proper divisors (11414166856).

12405665144 is a wasteful number, since it uses less digits than its factorization.

12405665144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220727 (or 220723 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 38.

The spelling of 12405665144 in words is "twelve billion, four hundred five million, six hundred sixty-five thousand, one hundred forty-four".