1218801727712 has 96 divisors (see below), whose sum is σ = 2460425647680. Its totient is φ = 594122158080.

The previous prime is 1218801727711. The next prime is 1218801727753. The reversal of 1218801727712 is 2177271088121.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1218801727711) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 194414114 + ... + 194420382.

It is an arithmetic number, because the mean of its divisors is an integer number (25629433830).

Almost surely, 2^{1218801727712} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1218801727712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1230212823840).

1218801727712 is an abundant number, since it is smaller than the sum of its proper divisors (1241623919968).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1218801727712 is a wasteful number, since it uses less digits than its factorization.

1218801727712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7204 (or 7196 counting only the distinct ones).

The product of its (nonzero) digits is 175616, while the sum is 47.

The spelling of 1218801727712 in words is "one trillion, two hundred eighteen billion, eight hundred one million, seven hundred twenty-seven thousand, seven hundred twelve".