7218035680 has 24 divisors (see below), whose sum is σ = 17052609672. Its totient is φ = 2887214208.

The previous prime is 7218035653. The next prime is 7218035687. The reversal of 7218035680 is 865308127.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7218035687) 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 3 ways as a sum of consecutive naturals, for example, 22556202 + ... + 22556521.

It is an arithmetic number, because the mean of its divisors is an integer number (710525403).

Almost surely, 2^7218035680 is an apocalyptic number.

It is an amenable number.

7218035680 is an abundant number, since it is smaller than the sum of its proper divisors (9834573992).

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

7218035680 is a wasteful number, since it uses less digits than its factorization.

7218035680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45112738 (or 45112730 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 7218035680 is about 84959.0235348783. The cubic root of 7218035680 is about 1932.5897634680.

The spelling of 7218035680 in words is "seven billion, two hundred eighteen million, thirty-five thousand, six hundred eighty".