1218803743272 has 32 divisors (see below), whose sum is σ = 3047465966400. Its totient is φ = 406207033344.

The previous prime is 1218803743271. The next prime is 1218803743327. The reversal of 1218803743272 is 2723473088121.

It is a super-2 number, since 2×1218803743272² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1218803743271) 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, 3641433 + ... + 3962024.

It is an arithmetic number, because the mean of its divisors is an integer number (95233311450).

Almost surely, 2^{1218803743272} is an apocalyptic number.

1218803743272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1218803743272 is an abundant number, since it is smaller than the sum of its proper divisors (1828662223128).

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

1218803743272 is a wasteful number, since it uses less digits than its factorization.

1218803743272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7610145 (or 7610141 counting only the distinct ones).

The product of its (nonzero) digits is 903168, while the sum is 48.

The spelling of 1218803743272 in words is "one trillion, two hundred eighteen billion, eight hundred three million, seven hundred forty-three thousand, two hundred seventy-two".