218605454585 has 16 divisors (see below), whose sum is σ = 302454884736. Its totient is φ = 148574323968.

The previous prime is 218605454549. The next prime is 218605454621. The reversal of 218605454585 is 585454506812.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (218605454549) and next prime (218605454621).

It is not a de Polignac number, because 218605454585 - 2³⁴ = 201425585401 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27632639 + ... + 27640548.

It is an arithmetic number, because the mean of its divisors is an integer number (18903430296).

Almost surely, 2^218605454585 is an apocalyptic number.

It is an amenable number.

218605454585 is a deficient number, since it is larger than the sum of its proper divisors (83849430151).

218605454585 is a wasteful number, since it uses less digits than its factorization.

218605454585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55273312.

The product of its (nonzero) digits is 7680000, while the sum is 53.

The spelling of 218605454585 in words is "two hundred eighteen billion, six hundred five million, four hundred fifty-four thousand, five hundred eighty-five".