688888888888889 has 8 divisors (see below), whose sum is σ = 741881412784512. Its totient is φ = 635896517979600.

The previous prime is 688888888888867. The next prime is 688888888889009. The reversal of 688888888888889 is 988888888888886.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-688888888888889 is a prime.

688888888888889 is a strobogrammatic number because it is the same when read upside-down.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (688888888888289) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28808039 + ... + 46985964.

It is an arithmetic number, because the mean of its divisors is an integer number (92735176598064).

Almost surely, 2^{688888888888889} is an apocalyptic number.

It is an amenable number.

688888888888889 is a deficient number, since it is larger than the sum of its proper divisors (52992523895623).

688888888888889 is a wasteful number, since it uses less digits than its factorization.

688888888888889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76493167.

The product of its digits is 29686813949952, while the sum is 119.

It can be divided in two parts, 68888888 and 8888889, that added together give a palindrome (77777777).

The spelling of 688888888888889 in words is "six hundred eighty-eight trillion, eight hundred eighty-eight billion, eight hundred eighty-eight million, eight hundred eighty-eight thousand, eight hundred eighty-nine".