12440144044564 has 24 divisors (see below), whose sum is σ = 23059228483368. Its totient is φ = 5852058869760.

The previous prime is 12440144044511. The next prime is 12440144044571. The reversal of 12440144044564 is 46544044104421.

It can be written as a sum of positive squares in 4 ways, for example, as 8479208200464 + 3960935844100 = 2911908^2 + 1990210^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12440144044564.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33038967 + ... + 33413374.

It is an arithmetic number, because the mean of its divisors is an integer number (960801186807).

Almost surely, 2^{12440144044564} is an apocalyptic number.

It is an amenable number.

12440144044564 is a deficient number, since it is larger than the sum of its proper divisors (10619084438804).

12440144044564 is a wasteful number, since it uses less digits than its factorization.

12440144044564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66455115 (or 66455113 counting only the distinct ones).

The product of its (nonzero) digits is 983040, while the sum is 43.

Adding to 12440144044564 its reverse (46544044104421), we get a palindrome (58984188148985).

The spelling of 12440144044564 in words is "twelve trillion, four hundred forty billion, one hundred forty-four million, forty-four thousand, five hundred sixty-four".