218861573240 has 16 divisors (see below), whose sum is σ = 492438539880. Its totient is φ = 87544629280.

The previous prime is 218861573233. The next prime is 218861573267. The reversal of 218861573240 is 42375168812.

218861573240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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, 2735769626 + ... + 2735769705.

Almost surely, 2^218861573240 is an apocalyptic number.

218861573240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

218861573240 is an abundant number, since it is smaller than the sum of its proper divisors (273576966640).

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

218861573240 is a wasteful number, since it uses less digits than its factorization.

218861573240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5471539342 (or 5471539338 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 47.

The spelling of 218861573240 in words is "two hundred eighteen billion, eight hundred sixty-one million, five hundred seventy-three thousand, two hundred forty".