617868689718 has 128 divisors (see below), whose sum is σ = 1515720729600. Its totient is φ = 163971205632.

The previous prime is 617868689717. The next prime is 617868689741. The reversal of 617868689718 is 817986868716.

617868689718 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 617868689718.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (617868689717) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 71599428 + ... + 71608056.

It is an arithmetic number, because the mean of its divisors is an integer number (11841568200).

Almost surely, 2^617868689718 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 617868689718, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (757860364800).

617868689718 is an abundant number, since it is smaller than the sum of its proper divisors (897852039882).

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

617868689718 is a wasteful number, since it uses less digits than its factorization.

617868689718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10406.

The product of its digits is 390168576, while the sum is 75.

The spelling of 617868689718 in words is "six hundred seventeen billion, eight hundred sixty-eight million, six hundred eighty-nine thousand, seven hundred eighteen".