687938615087 has 16 divisors (see below), whose sum is σ = 726371960832. Its totient is φ = 650236519680.

The previous prime is 687938615059. The next prime is 687938615107. The reversal of 687938615087 is 780516839786.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 687938615087 - 2¹⁴ = 687938598703 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687938615047) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1205162 + ... + 1681752.

It is an arithmetic number, because the mean of its divisors is an integer number (45398247552).

Almost surely, 2^687938615087 is an apocalyptic number.

687938615087 is a deficient number, since it is larger than the sum of its proper divisors (38433345745).

687938615087 is a wasteful number, since it uses less digits than its factorization.

687938615087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477358.

The product of its (nonzero) digits is 121927680, while the sum is 68.

The spelling of 687938615087 in words is "six hundred eighty-seven billion, nine hundred thirty-eight million, six hundred fifteen thousand, eighty-seven".