4518538128 has 240 divisors, whose sum is σ = 14295960000. Its totient is φ = 1365451776.

The previous prime is 4518538121. The next prime is 4518538133. The reversal of 4518538128 is 8218358154.

4518538128 is a `hidden beast` number, since 4 + 518 + 5 + 3 + 8 + 128 = 666.

It is not an unprimeable number, because it can be changed into a prime (4518538121) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4306948 + ... + 4307996.

It is an arithmetic number, because the mean of its divisors is an integer number (59566500).

Almost surely, 2^4518538128 is an apocalyptic number.

4518538128 is a gapful number since it is divisible by the number (48) 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 4518538128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7147980000).

4518538128 is an abundant number, since it is smaller than the sum of its proper divisors (9777421872).

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

4518538128 is a wasteful number, since it uses less digits than its factorization.

4518538128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1151 (or 1126 counting only the distinct ones).

The product of its digits is 307200, while the sum is 45.

The square root of 4518538128 is about 67220.0723593779. The cubic root of 4518538128 is about 1653.2276128347.

The spelling of 4518538128 in words is "four billion, five hundred eighteen million, five hundred thirty-eight thousand, one hundred twenty-eight".