687726853056 has 280 divisors, whose sum is σ = 2160790750800. Its totient is φ = 215534297088.

The previous prime is 687726853049. The next prime is 687726853067. The reversal of 687726853056 is 650358627786.

It is a happy number.

687726853056 is a `hidden beast` number, since 6 + 8 + 77 + 26 + 8 + 530 + 5 + 6 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 687726852984 and 687726853002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 98964270 + ... + 98971218.

Almost surely, 2^687726853056 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 687726853056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1080395375400).

687726853056 is an abundant number, since it is smaller than the sum of its proper divisors (1473063897744).

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

687726853056 is a wasteful number, since it uses less digits than its factorization.

687726853056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8113 (or 8094 counting only the distinct ones).

The product of its (nonzero) digits is 101606400, while the sum is 63.

The spelling of 687726853056 in words is "six hundred eighty-seven billion, seven hundred twenty-six million, eight hundred fifty-three thousand, fifty-six".