687563131875 has 20 divisors (see below), whose sum is σ = 1145571855912. Its totient is φ = 366700336000.

The previous prime is 687563131867. The next prime is 687563131889. The reversal of 687563131875 is 578131365786.

It is a happy number.

687563131875 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 687563131875 - 2³ = 687563131867 is a prime.

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, 183348294 + ... + 183352043.

Almost surely, 2^687563131875 is an apocalyptic number.

687563131875 is a deficient number, since it is larger than the sum of its proper divisors (458008724037).

687563131875 is an equidigital number, since it uses as much as digits as its factorization.

687563131875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366700360 (or 366700345 counting only the distinct ones).

The product of its digits is 25401600, while the sum is 60.

The spelling of 687563131875 in words is "six hundred eighty-seven billion, five hundred sixty-three million, one hundred thirty-one thousand, eight hundred seventy-five".