218505454046 has 16 divisors (see below), whose sum is σ = 357569856000. Its totient is φ = 99316361880.

The previous prime is 218505454031. The next prime is 218505454049. The reversal of 218505454046 is 640454505812.

It is a junction number, because it is equal to n+sod(n) for n = 218505453988 and 218505454006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218505454049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 336275 + ... + 741681.

It is an arithmetic number, because the mean of its divisors is an integer number (22348116000).

Almost surely, 2^218505454046 is an apocalyptic number.

218505454046 is a deficient number, since it is larger than the sum of its proper divisors (139064401954).

218505454046 is a wasteful number, since it uses less digits than its factorization.

218505454046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429919.

The product of its (nonzero) digits is 768000, while the sum is 44.

Adding to 218505454046 its reverse (640454505812), we get a palindrome (858959959858).

The spelling of 218505454046 in words is "two hundred eighteen billion, five hundred five million, four hundred fifty-four thousand, forty-six".