1218451057144 has 8 divisors (see below), whose sum is σ = 2284595732160. Its totient is φ = 609225528568.

The previous prime is 1218451057069. The next prime is 1218451057151. The reversal of 1218451057144 is 4417501548121.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 1218451057144.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76153191064 + ... + 76153191079.

It is an arithmetic number, because the mean of its divisors is an integer number (285574466520).

Almost surely, 2^{1218451057144} is an apocalyptic number.

It is an amenable number.

1218451057144 is a deficient number, since it is larger than the sum of its proper divisors (1066144675016).

1218451057144 is a wasteful number, since it uses less digits than its factorization.

1218451057144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152306382149 (or 152306382145 counting only the distinct ones).

The product of its (nonzero) digits is 179200, while the sum is 43.

The spelling of 1218451057144 in words is "one trillion, two hundred eighteen billion, four hundred fifty-one million, fifty-seven thousand, one hundred forty-four".