1218518452812 has 96 divisors (see below), whose sum is σ = 3071583244800. Its totient is φ = 374778772992.

The previous prime is 1218518452787. The next prime is 1218518452903. The reversal of 1218518452812 is 2182548158121.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1287489 + ... + 2023527.

It is an arithmetic number, because the mean of its divisors is an integer number (31995658800).

Almost surely, 2^{1218518452812} is an apocalyptic number.

1218518452812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1218518452812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1535791622400).

1218518452812 is an abundant number, since it is smaller than the sum of its proper divisors (1853064791988).

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

1218518452812 is a wasteful number, since it uses less digits than its factorization.

1218518452812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 736255 (or 736253 counting only the distinct ones).

The product of its digits is 409600, while the sum is 48.

The spelling of 1218518452812 in words is "one trillion, two hundred eighteen billion, five hundred eighteen million, four hundred fifty-two thousand, eight hundred twelve".