218640852617045 has 16 divisors (see below), whose sum is σ = 262596074335488. Its totient is φ = 174761318047680.

The previous prime is 218640852617023. The next prime is 218640852617051. The reversal of 218640852617045 is 540716258046812.

218640852617045 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 218640852617045 - 2¹⁸ = 218640852354901 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent 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, 722396687 + ... + 722699283.

It is an arithmetic number, because the mean of its divisors is an integer number (16412254645968).

Almost surely, 2^{218640852617045} is an apocalyptic number.

It is an amenable number.

218640852617045 is a deficient number, since it is larger than the sum of its proper divisors (43955221718443).

218640852617045 is a wasteful number, since it uses less digits than its factorization.

218640852617045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427180.

The product of its (nonzero) digits is 25804800, while the sum is 59.

The spelling of 218640852617045 in words is "two hundred eighteen trillion, six hundred forty billion, eight hundred fifty-two million, six hundred seventeen thousand, forty-five".