688747484747886 has 64 divisors (see below), whose sum is σ = 1451935207005696. Its totient is φ = 217578008995200.

The previous prime is 688747484747869. The next prime is 688747484747981.

688747484747886 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 688747484747793 and 688747484747802.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 261924925 + ... + 264541416.

It is an arithmetic number, because the mean of its divisors is an integer number (22686487609464).

Almost surely, 2^{688747484747886} is an apocalyptic number.

688747484747886 is an abundant number, since it is smaller than the sum of its proper divisors (763187722257810).

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

688747484747886 is a wasteful number, since it uses less digits than its factorization.

688747484747886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526466537.

The product of its digits is 725077721088, while the sum is 96.

The spelling of 688747484747886 in words is "six hundred eighty-eight trillion, seven hundred forty-seven billion, four hundred eighty-four million, seven hundred forty-seven thousand, eight hundred eighty-six".