688225064 has 16 divisors (see below), whose sum is σ = 1290700320. Its totient is φ = 344038320.

The previous prime is 688225003. The next prime is 688225073. The reversal of 688225064 is 460522886.

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 3 ways as a sum of consecutive naturals, for example, 67997 + ... + 77459.

It is an arithmetic number, because the mean of its divisors is an integer number (80668770).

Almost surely, 2^688225064 is an apocalyptic number.

It is an amenable number.

688225064 is a deficient number, since it is larger than the sum of its proper divisors (602475256).

688225064 is a wasteful number, since it uses less digits than its factorization.

688225064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18560 (or 18556 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 41.

The square root of 688225064 is about 26234.0439886801. The cubic root of 688225064 is about 882.8972449405.

The spelling of 688225064 in words is "six hundred eighty-eight million, two hundred twenty-five thousand, sixty-four".