688464485654 has 64 divisors (see below), whose sum is σ = 1143297441792. Its totient is φ = 308334499200.

The previous prime is 688464485641. The next prime is 688464485677. The reversal of 688464485654 is 456584464886.

It is a Curzon number.

It is a congruent number.

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 in 31 ways as a sum of consecutive naturals, for example, 501430112 + ... + 501431484.

It is an arithmetic number, because the mean of its divisors is an integer number (17864022528).

Almost surely, 2^688464485654 is an apocalyptic number.

688464485654 is a deficient number, since it is larger than the sum of its proper divisors (454832956138).

688464485654 is a wasteful number, since it uses less digits than its factorization.

688464485654 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2621.

The product of its digits is 707788800, while the sum is 68.

The spelling of 688464485654 in words is "six hundred eighty-eight billion, four hundred sixty-four million, four hundred eighty-five thousand, six hundred fifty-four".