218299704672 has 48 divisors (see below), whose sum is σ = 654899116032. Its totient is φ = 62371344000.

The previous prime is 218299704659. The next prime is 218299704677. The reversal of 218299704672 is 276407992812.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×218299704672² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218299704677) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162424704 + ... + 162426047.

It is an arithmetic number, because the mean of its divisors is an integer number (13643731584).

Almost surely, 2^218299704672 is an apocalyptic number.

It is an amenable number.

218299704672 is an abundant number, since it is smaller than the sum of its proper divisors (436599411360).

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

218299704672 is a wasteful number, since it uses less digits than its factorization.

218299704672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324850771 (or 324850763 counting only the distinct ones).

The product of its (nonzero) digits is 6096384, while the sum is 57.

The spelling of 218299704672 in words is "two hundred eighteen billion, two hundred ninety-nine million, seven hundred four thousand, six hundred seventy-two".