687568819375 has 20 divisors (see below), whose sum is σ = 860950620112. Its totient is φ = 548925336000.

The previous prime is 687568819369. The next prime is 687568819481. The reversal of 687568819375 is 573918865786.

It is not a de Polignac number, because 687568819375 - 2¹³ = 687568811183 is a prime.

It is a Smith number, since the sum of its digits (73) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 687568819298 and 687568819307.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 825102 + ... + 1433851.

Almost surely, 2^687568819375 is an apocalyptic number.

687568819375 is a deficient number, since it is larger than the sum of its proper divisors (173381800737).

687568819375 is an equidigital number, since it uses as much as digits as its factorization.

687568819375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2259460 (or 2259445 counting only the distinct ones).

The product of its digits is 609638400, while the sum is 73.

The spelling of 687568819375 in words is "six hundred eighty-seven billion, five hundred sixty-eight million, eight hundred nineteen thousand, three hundred seventy-five".