218709155563564 has 12 divisors (see below), whose sum is σ = 402885286564600. Its totient is φ = 103599073687968.

The previous prime is 218709155563553. The next prime is 218709155563579. The reversal of 218709155563564 is 465365551907812.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 218709155563564.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1438876023369 + ... + 1438876023520.

It is a 1-persistent number, because it is pandigital, but 2⋅218709155563564 = 437418311127128 is not.

Almost surely, 2^{218709155563564} is an apocalyptic number.

It is an amenable number.

218709155563564 is a deficient number, since it is larger than the sum of its proper divisors (184176131001036).

218709155563564 is a wasteful number, since it uses less digits than its factorization.

218709155563564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2877752046912 (or 2877752046910 counting only the distinct ones).

The product of its (nonzero) digits is 272160000, while the sum is 67.

The spelling of 218709155563564 in words is "two hundred eighteen trillion, seven hundred nine billion, one hundred fifty-five million, five hundred sixty-three thousand, five hundred sixty-four".