16218118458 has 64 divisors (see below), whose sum is σ = 38188723200. Its totient is φ = 5087545200.

The previous prime is 16218118457. The next prime is 16218118471. The reversal of 16218118458 is 85481181261.

16218118458 is a `hidden beast` number, since 1 + 6 + 2 + 181 + 18 + 458 = 666.

It is not an unprimeable number, because it can be changed into a prime (16218118451) by changing a digit.

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, 102585 + ... + 207267.

It is an arithmetic number, because the mean of its divisors is an integer number (596698800).

Almost surely, 2^16218118458 is an apocalyptic number.

16218118458 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 16218118458, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19094361600).

16218118458 is an abundant number, since it is smaller than the sum of its proper divisors (21970604742).

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

16218118458 is a wasteful number, since it uses less digits than its factorization.

16218118458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104864 (or 104858 counting only the distinct ones).

The product of its digits is 122880, while the sum is 45.

The spelling of 16218118458 in words is "sixteen billion, two hundred eighteen million, one hundred eighteen thousand, four hundred fifty-eight".