687654044870 has 16 divisors (see below), whose sum is σ = 1332990918000. Its totient is φ = 253903031904.

The previous prime is 687654044849. The next prime is 687654044897. The reversal of 687654044870 is 78440456786.

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, 2644823120 + ... + 2644823379.

It is an arithmetic number, because the mean of its divisors is an integer number (83311932375).

Almost surely, 2^687654044870 is an apocalyptic number.

687654044870 is a deficient number, since it is larger than the sum of its proper divisors (645336873130).

687654044870 is a wasteful number, since it uses less digits than its factorization.

687654044870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5289646519.

The product of its (nonzero) digits is 36126720, while the sum is 59.

The spelling of 687654044870 in words is "six hundred eighty-seven billion, six hundred fifty-four million, forty-four thousand, eight hundred seventy".