1218949275489 has 8 divisors (see below), whose sum is σ = 1773017128032. Its totient is φ = 738757136640.

The previous prime is 1218949275487. The next prime is 1218949275497. The reversal of 1218949275489 is 9845729498121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1218949275489 - 2¹ = 1218949275487 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1218949275487) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 18468928384 + ... + 18468928449.

It is an arithmetic number, because the mean of its divisors is an integer number (221627141004).

Almost surely, 2^{1218949275489} is an apocalyptic number.

It is an amenable number.

1218949275489 is a deficient number, since it is larger than the sum of its proper divisors (554067852543).

1218949275489 is a wasteful number, since it uses less digits than its factorization.

1218949275489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36937856847.

The product of its digits is 104509440, while the sum is 69.

The spelling of 1218949275489 in words is "one trillion, two hundred eighteen billion, nine hundred forty-nine million, two hundred seventy-five thousand, four hundred eighty-nine".