1218989899193 has 8 divisors (see below), whose sum is σ = 1331422977216. Its totient is φ = 1106826123600.

The previous prime is 1218989899189. The next prime is 1218989899199. The reversal of 1218989899193 is 3919989898121.

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

It is a cyclic number.

It is not a de Polignac number, because 1218989899193 - 2² = 1218989899189 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1218989899199) 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, 67316138 + ... + 67334243.

It is an arithmetic number, because the mean of its divisors is an integer number (166427872152).

Almost surely, 2^{1218989899193} is an apocalyptic number.

It is an amenable number.

1218989899193 is a deficient number, since it is larger than the sum of its proper divisors (112433078023).

1218989899193 is a wasteful number, since it uses less digits than its factorization.

1218989899193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134651215.

The product of its digits is 181398528, while the sum is 77.

The spelling of 1218989899193 in words is "one trillion, two hundred eighteen billion, nine hundred eighty-nine million, eight hundred ninety-nine thousand, one hundred ninety-three".