687698847584 has 96 divisors (see below), whose sum is σ = 1588223863296. Its totient is φ = 286966010880.

The previous prime is 687698847503. The next prime is 687698847601. The reversal of 687698847584 is 485748896786.

It is a junction number, because it is equal to n+sod(n) for n = 687698847499 and 687698847508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4545119 + ... + 4693985.

It is an arithmetic number, because the mean of its divisors is an integer number (16543998576).

Almost surely, 2^687698847584 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 687698847584, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (794111931648).

687698847584 is an abundant number, since it is smaller than the sum of its proper divisors (900525015712).

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

687698847584 is a wasteful number, since it uses less digits than its factorization.

687698847584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149428 (or 149420 counting only the distinct ones).

The product of its digits is 5202247680, while the sum is 80.

The spelling of 687698847584 in words is "six hundred eighty-seven billion, six hundred ninety-eight million, eight hundred forty-seven thousand, five hundred eighty-four".