618506316 has 72 divisors (see below), whose sum is σ = 1702537200. Its totient is φ = 188576640.

The previous prime is 618506249. The next prime is 618506321. The reversal of 618506316 is 613605816.

It is a happy number.

618506316 is a `hidden beast` number, since 6 + 18 + 5 + 0 + 631 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4246 + ... + 35426.

It is an arithmetic number, because the mean of its divisors is an integer number (23646350).

Almost surely, 2^618506316 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 618506316, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (851268600).

618506316 is an abundant number, since it is smaller than the sum of its proper divisors (1084030884).

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

618506316 is a wasteful number, since it uses less digits than its factorization.

618506316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31239 (or 31234 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 618506316 is about 24869.7872126000. The cubic root of 618506316 is about 852.0165803822.

The spelling of 618506316 in words is "six hundred eighteen million, five hundred six thousand, three hundred sixteen".