688818888816 has 40 divisors (see below), whose sum is σ = 1779479689344. Its totient is φ = 229602310080.

The previous prime is 688818888809. The next prime is 688818888859. The reversal of 688818888816 is 618888818886.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4260171 + ... + 4418901.

Almost surely, 2^688818888816 is an apocalyptic number.

It is an amenable number.

688818888816 is an abundant number, since it is smaller than the sum of its proper divisors (1090660800528).

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

688818888816 is a wasteful number, since it uses less digits than its factorization.

688818888816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249149 (or 249143 counting only the distinct ones).

The product of its digits is 603979776, while the sum is 78.

The spelling of 688818888816 in words is "six hundred eighty-eight billion, eight hundred eighteen million, eight hundred eighty-eight thousand, eight hundred sixteen".