618005538 has 80 divisors (see below), whose sum is σ = 1476161280. Its totient is φ = 192798144.

The previous prime is 618005489. The next prime is 618005551. The reversal of 618005538 is 835500816.

618005538 is a `hidden beast` number, since 618 + 0 + 0 + 5 + 5 + 38 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 173358 + ... + 176886.

It is an arithmetic number, because the mean of its divisors is an integer number (18452016).

Almost surely, 2^618005538 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 618005538, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (738080640).

618005538 is an abundant number, since it is smaller than the sum of its proper divisors (858155742).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

618005538 is a wasteful number, since it uses less digits than its factorization.

618005538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3613 (or 3604 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 618005538 is about 24859.7171745778. The cubic root of 618005538 is about 851.7865712175.

The spelling of 618005538 in words is "six hundred eighteen million, five thousand, five hundred thirty-eight".