218640416105 has 8 divisors (see below), whose sum is σ = 263413793664. Its totient is φ = 174215470000.

The previous prime is 218640416083. The next prime is 218640416143. The reversal of 218640416105 is 501614046812.

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

It is not a de Polignac number, because 218640416105 - 2⁶ = 218640416041 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87106481 + ... + 87108990.

It is an arithmetic number, because the mean of its divisors is an integer number (32926724208).

Almost surely, 2^218640416105 is an apocalyptic number.

It is an amenable number.

218640416105 is a deficient number, since it is larger than the sum of its proper divisors (44773377559).

218640416105 is a wasteful number, since it uses less digits than its factorization.

218640416105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174215727.

The product of its (nonzero) digits is 46080, while the sum is 38.

The spelling of 218640416105 in words is "two hundred eighteen billion, six hundred forty million, four hundred sixteen thousand, one hundred five".