688216873882 has 4 divisors (see below), whose sum is σ = 1032325310826. Its totient is φ = 344108436940.

The previous prime is 688216873859. The next prime is 688216873909. The reversal of 688216873882 is 288378612886.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 572684184081 + 115532689801 = 756759^2 + 339901^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172054218469 + ... + 172054218472.

Almost surely, 2^688216873882 is an apocalyptic number.

688216873882 is a deficient number, since it is larger than the sum of its proper divisors (344108436944).

688216873882 is a wasteful number, since it uses less digits than its factorization.

688216873882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344108436943.

The product of its digits is 99090432, while the sum is 67.

The spelling of 688216873882 in words is "six hundred eighty-eight billion, two hundred sixteen million, eight hundred seventy-three thousand, eight hundred eighty-two".