218801378012 has 12 divisors (see below), whose sum is σ = 437602756080. Its totient is φ = 93772019136.

The previous prime is 218801377999. The next prime is 218801378017. The reversal of 218801378012 is 210873108812.

218801378012 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218801378017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3907167437 + ... + 3907167492.

It is an arithmetic number, because the mean of its divisors is an integer number (36466896340).

Almost surely, 2^218801378012 is an apocalyptic number.

It is an amenable number.

218801378012 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

218801378012 is a wasteful number, since it uses less digits than its factorization.

218801378012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7814334940 (or 7814334938 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 41.

The spelling of 218801378012 in words is "two hundred eighteen billion, eight hundred one million, three hundred seventy-eight thousand, twelve".