688966843804 has 12 divisors (see below), whose sum is σ = 1214895733128. Its totient is φ = 341853777200.

The previous prime is 688966843793. The next prime is 688966843811. The reversal of 688966843804 is 408348669886.

It is a super-2 number, since 2×688966843804² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 657410587 + ... + 657411634.

It is an arithmetic number, because the mean of its divisors is an integer number (101241311094).

Almost surely, 2^688966843804 is an apocalyptic number.

It is an amenable number.

688966843804 is a deficient number, since it is larger than the sum of its proper divisors (525928889324).

688966843804 is a wasteful number, since it uses less digits than its factorization.

688966843804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1314822356 (or 1314822354 counting only the distinct ones).

The product of its (nonzero) digits is 382205952, while the sum is 70.

The spelling of 688966843804 in words is "six hundred eighty-eight billion, nine hundred sixty-six million, eight hundred forty-three thousand, eight hundred four".