218801378011 has 6 divisors (see below), whose sum is σ = 223007601740. Its totient is φ = 214673047368.

The previous prime is 218801377999. The next prime is 218801378017. The reversal of 218801378011 is 110873108812.

218801378011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 218801378011 - 2¹⁹ = 218800853723 is a prime.

It is a super-2 number, since 2×218801378011² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

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

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 5 ways as a sum of consecutive naturals, for example, 38943681 + ... + 38949298.

Almost surely, 2^218801378011 is an apocalyptic number.

218801378011 is a deficient number, since it is larger than the sum of its proper divisors (4206223729).

218801378011 is an frugal number, since it uses more digits than its factorization.

218801378011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77893085 (or 77893032 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 40.

The spelling of 218801378011 in words is "two hundred eighteen billion, eight hundred one million, three hundred seventy-eight thousand, eleven".