218109593309 has 8 divisors (see below), whose sum is σ = 231817671360. Its totient is φ = 204499082176.

The previous prime is 218109593279. The next prime is 218109593333. The reversal of 218109593309 is 903395901812.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 218109593309 - 2¹² = 218109589213 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218109593389) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24387119 + ... + 24396060.

It is an arithmetic number, because the mean of its divisors is an integer number (28977208920).

Almost surely, 2^218109593309 is an apocalyptic number.

It is an amenable number.

218109593309 is a deficient number, since it is larger than the sum of its proper divisors (13708078051).

218109593309 is a wasteful number, since it uses less digits than its factorization.

218109593309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48783459.

The product of its (nonzero) digits is 524880, while the sum is 50.

The spelling of 218109593309 in words is "two hundred eighteen billion, one hundred nine million, five hundred ninety-three thousand, three hundred nine".