687819057288 has 128 divisors (see below), whose sum is σ = 1923012887040. Its totient is φ = 203199296000.

The previous prime is 687819057281. The next prime is 687819057307. The reversal of 687819057288 is 882750918786.

It is not an unprimeable number, because it can be changed into a prime (687819057281) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15423583 + ... + 15468113.

It is an arithmetic number, because the mean of its divisors is an integer number (15023538180).

Almost surely, 2^687819057288 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 687819057288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (961506443520).

687819057288 is an abundant number, since it is smaller than the sum of its proper divisors (1235193829752).

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

687819057288 is a wasteful number, since it uses less digits than its factorization.

687819057288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46019 (or 46015 counting only the distinct ones).

The product of its (nonzero) digits is 108380160, while the sum is 69.

The spelling of 687819057288 in words is "six hundred eighty-seven billion, eight hundred nineteen million, fifty-seven thousand, two hundred eighty-eight".