687135709848 has 192 divisors, whose sum is σ = 2022919712640. Its totient is φ = 193916868096.

The previous prime is 687135709807. The next prime is 687135709861. The reversal of 687135709848 is 848907531786.

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, 43655836 + ... + 43671572.

It is an arithmetic number, because the mean of its divisors is an integer number (10536040170).

Almost surely, 2^687135709848 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 687135709848, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1011459856320).

687135709848 is an abundant number, since it is smaller than the sum of its proper divisors (1335784002792).

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

687135709848 is a wasteful number, since it uses less digits than its factorization.

687135709848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16214 (or 16203 counting only the distinct ones).

The product of its (nonzero) digits is 81285120, while the sum is 66.

The spelling of 687135709848 in words is "six hundred eighty-seven billion, one hundred thirty-five million, seven hundred nine thousand, eight hundred forty-eight".