687757775694 has 16 divisors (see below), whose sum is σ = 1500562419840. Its totient is φ = 208411447160.

The previous prime is 687757775681. The next prime is 687757775723. The reversal of 687757775694 is 496577757786.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5210286114 + ... + 5210286245.

It is an arithmetic number, because the mean of its divisors is an integer number (93785151240).

Almost surely, 2^687757775694 is an apocalyptic number.

687757775694 is an abundant number, since it is smaller than the sum of its proper divisors (812804644146).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

687757775694 is a wasteful number, since it uses less digits than its factorization.

687757775694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10420572375.

The product of its digits is 4356374400, while the sum is 78.

The spelling of 687757775694 in words is "six hundred eighty-seven billion, seven hundred fifty-seven million, seven hundred seventy-five thousand, six hundred ninety-four".