618563327616 has 192 divisors, whose sum is σ = 1918015401120. Its totient is φ = 190216636416.

The previous prime is 618563327611. The next prime is 618563327639. The reversal of 618563327616 is 616723365816.

618563327616 is a `hidden beast` number, since 6 + 1 + 8 + 563 + 3 + 2 + 76 + 1 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

It is not an unprimeable number, because it can be changed into a prime (618563327611) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27949131 + ... + 27971253.

Almost surely, 2^618563327616 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 618563327616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (959007700560).

618563327616 is an abundant number, since it is smaller than the sum of its proper divisors (1299452073504).

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

618563327616 is a wasteful number, since it uses less digits than its factorization.

618563327616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24023 (or 24008 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 54.

The spelling of 618563327616 in words is "six hundred eighteen billion, five hundred sixty-three million, three hundred twenty-seven thousand, six hundred sixteen".