618834800018 has 6 divisors (see below), whose sum is σ = 928253868789. Its totient is φ = 309416843756.

The previous prime is 618834799991. The next prime is 618834800039. The reversal of 618834800018 is 810008438816.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 572054733649 + 46780066369 = 756343^2 + 216287^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=556253.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 834380 + ... + 1390632.

Almost surely, 2^618834800018 is an apocalyptic number.

618834800018 is a deficient number, since it is larger than the sum of its proper divisors (309419068771).

618834800018 is an frugal number, since it uses more digits than its factorization.

618834800018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112508 (or 556255 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 47.

The spelling of 618834800018 in words is "six hundred eighteen billion, eight hundred thirty-four million, eight hundred thousand, eighteen".