7218545280 has 256 divisors, whose sum is σ = 23818354560. Its totient is φ = 1858273280.

The previous prime is 7218545267. The next prime is 7218545281. The reversal of 7218545280 is 825458127.

It is not an unprimeable number, because it can be changed into a prime (7218545281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8422612 + ... + 8423468.

Almost surely, 2^7218545280 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 7218545280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11909177280).

7218545280 is an abundant number, since it is smaller than the sum of its proper divisors (16599809280).

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

7218545280 is a wasteful number, since it uses less digits than its factorization.

7218545280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1027 (or 1015 counting only the distinct ones).

The product of its (nonzero) digits is 179200, while the sum is 42.

The square root of 7218545280 is about 84962.0225747951. The cubic root of 7218545280 is about 1932.6352432731.

The spelling of 7218545280 in words is "seven billion, two hundred eighteen million, five hundred forty-five thousand, two hundred eighty".