687614900856 has 192 divisors, whose sum is σ = 1896113185920. Its totient is φ = 207656317440.

The previous prime is 687614900849. The next prime is 687614900941. The reversal of 687614900856 is 658009416786.

It is a self number, because there is not a number n which added to its sum of digits gives 687614900856.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 76901346 + ... + 76910286.

It is an arithmetic number, because the mean of its divisors is an integer number (9875589510).

Almost surely, 2^687614900856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 687614900856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (948056592960).

687614900856 is an abundant number, since it is smaller than the sum of its proper divisors (1208498285064).

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

687614900856 is a wasteful number, since it uses less digits than its factorization.

687614900856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9326 (or 9309 counting only the distinct ones).

The product of its (nonzero) digits is 17418240, while the sum is 60.

The spelling of 687614900856 in words is "six hundred eighty-seven billion, six hundred fourteen million, nine hundred thousand, eight hundred fifty-six".