218564858846 has 8 divisors (see below), whose sum is σ = 327887201880. Its totient is φ = 109269124888.

The previous prime is 218564858789. The next prime is 218564858867. The reversal of 218564858846 is 648858465812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 6631721 + ... + 6664596.

It is an arithmetic number, because the mean of its divisors is an integer number (40985900235).

Almost surely, 2^218564858846 is an apocalyptic number.

218564858846 is a deficient number, since it is larger than the sum of its proper divisors (109322343034).

218564858846 is a wasteful number, since it uses less digits than its factorization.

218564858846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13304538.

The product of its digits is 117964800, while the sum is 65.

The spelling of 218564858846 in words is "two hundred eighteen billion, five hundred sixty-four million, eight hundred fifty-eight thousand, eight hundred forty-six".