1218218726488 has 16 divisors (see below), whose sum is σ = 2284201395000. Its totient is φ = 609098354496.

The previous prime is 1218218726447. The next prime is 1218218726489. The reversal of 1218218726488 is 8846278128121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1218218726489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 895938 + ... + 1799761.

Almost surely, 2^{1218218726488} is an apocalyptic number.

It is an amenable number.

1218218726488 is a deficient number, since it is larger than the sum of its proper divisors (1065982668512).

1218218726488 is a wasteful number, since it uses less digits than its factorization.

1218218726488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2752194 (or 2752190 counting only the distinct ones).

The product of its digits is 5505024, while the sum is 58.

The spelling of 1218218726488 in words is "one trillion, two hundred eighteen billion, two hundred eighteen million, seven hundred twenty-six thousand, four hundred eighty-eight".