218408781487080 has 32 divisors (see below), whose sum is σ = 655226344461600. Its totient is φ = 58242341729856.

The previous prime is 218408781487049. The next prime is 218408781487109. The reversal of 218408781487080 is 80784187804812.

It is a Smith number, since the sum of its digits (66) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 910036589410 + ... + 910036589649.

It is an arithmetic number, because the mean of its divisors is an integer number (20475823264425).

Almost surely, 2^{218408781487080} is an apocalyptic number.

218408781487080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

218408781487080 is an abundant number, since it is smaller than the sum of its proper divisors (436817562974520).

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

218408781487080 is a wasteful number, since it uses less digits than its factorization.

218408781487080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1820073179073 (or 1820073179069 counting only the distinct ones).

The product of its (nonzero) digits is 51380224, while the sum is 66.

The spelling of 218408781487080 in words is "two hundred eighteen trillion, four hundred eight billion, seven hundred eighty-one million, four hundred eighty-seven thousand, eighty".