4518521280 has 672 divisors, whose sum is σ = 19993538880. Its totient is φ = 952197120.

The previous prime is 4518521279. The next prime is 4518521303. The reversal of 4518521280 is 821258154.

4518521280 is a `hidden beast` number, since 4 + 51 + 8 + 521 + 2 + 80 = 666.

It is a tau number, because it is divible by the number of its divisors (672).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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 95 ways as a sum of consecutive naturals, for example, 5503270 + ... + 5504090.

It is an arithmetic number, because the mean of its divisors is an integer number (29752290).

Almost surely, 2^4518521280 is an apocalyptic number.

4518521280 is a gapful number since it is divisible by the number (40) 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 4518521280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9996769440).

4518521280 is an abundant number, since it is smaller than the sum of its proper divisors (15475017600).

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

4518521280 is a wasteful number, since it uses less digits than its factorization.

4518521280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 874 (or 851 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 36.

The square root of 4518521280 is about 67219.9470395507. The cubic root of 4518521280 is about 1653.2255580689.

The spelling of 4518521280 in words is "four billion, five hundred eighteen million, five hundred twenty-one thousand, two hundred eighty".