1218616168 has 192 divisors, whose sum is σ = 3102624000. Its totient is φ = 437606400.

The previous prime is 1218616111. The next prime is 1218616177. The reversal of 1218616168 is 8616168121.

It is a super-2 number, since 2×1218616168² = 2970050729822008448, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1218616168.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8178558 + ... + 8178706.

It is an arithmetic number, because the mean of its divisors is an integer number (16159500).

Almost surely, 2^1218616168 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 1218616168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1551312000).

1218616168 is an abundant number, since it is smaller than the sum of its proper divisors (1884007832).

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

1218616168 is a wasteful number, since it uses less digits than its factorization.

1218616168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272 (or 257 counting only the distinct ones).

The product of its digits is 27648, while the sum is 40.

The square root of 1218616168 is about 34908.6832750821. The cubic root of 1218616168 is about 1068.1255702953.

The spelling of 1218616168 in words is "one billion, two hundred eighteen million, six hundred sixteen thousand, one hundred sixty-eight".