218373855072 has 24 divisors (see below), whose sum is σ = 573231369816. Its totient is φ = 72791284992.

The previous prime is 218373855053. The next prime is 218373855103. The reversal of 218373855072 is 270558373812.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1137363733 + ... + 1137363924.

It is an arithmetic number, because the mean of its divisors is an integer number (23884640409).

Almost surely, 2^218373855072 is an apocalyptic number.

It is an amenable number.

218373855072 is an abundant number, since it is smaller than the sum of its proper divisors (354857514744).

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

218373855072 is a wasteful number, since it uses less digits than its factorization.

218373855072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2274727670 (or 2274727662 counting only the distinct ones).

The product of its (nonzero) digits is 2822400, while the sum is 51.

The spelling of 218373855072 in words is "two hundred eighteen billion, three hundred seventy-three million, eight hundred fifty-five thousand, seventy-two".