13665543211042 has 24 divisors (see below), whose sum is σ = 21428713829376. Its totient is φ = 6535566858216.

The previous prime is 13665543211031. The next prime is 13665543211063. The reversal of 13665543211042 is 24011234556631.

It is a self number, because there is not a number n which added to its sum of digits gives 13665543211042.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 75373423 + ... + 75554509.

It is an arithmetic number, because the mean of its divisors is an integer number (892863076224).

Almost surely, 2^{13665543211042} is an apocalyptic number.

13665543211042 is a deficient number, since it is larger than the sum of its proper divisors (7763170618334).

13665543211042 is a wasteful number, since it uses less digits than its factorization.

13665543211042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252462 (or 252439 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 43.

Adding to 13665543211042 its reverse (24011234556631), we get a palindrome (37676777767673).

The spelling of 13665543211042 in words is "thirteen trillion, six hundred sixty-five billion, five hundred forty-three million, two hundred eleven thousand, forty-two".