687755867625 has 24 divisors (see below), whose sum is σ = 1239794579400. Its totient is φ = 366803128800.

The previous prime is 687755867597. The next prime is 687755867627. The reversal of 687755867625 is 526768557786.

687755867625 is a `hidden beast` number, since 6 + 8 + 7 + 7 + 558 + 6 + 7 + 62 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 1968164496 + 685787703129 = 44364^2 + 828123^2 .

It is not a de Polignac number, because 687755867625 - 2¹⁷ = 687755736553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (687755867627) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 305668150 + ... + 305670399.

It is an arithmetic number, because the mean of its divisors is an integer number (51658107475).

Almost surely, 2^687755867625 is an apocalyptic number.

It is an amenable number.

687755867625 is a deficient number, since it is larger than the sum of its proper divisors (552038711775).

687755867625 is a wasteful number, since it uses less digits than its factorization.

687755867625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611338570 (or 611338557 counting only the distinct ones).

The product of its digits is 1185408000, while the sum is 72.

The spelling of 687755867625 in words is "six hundred eighty-seven billion, seven hundred fifty-five million, eight hundred sixty-seven thousand, six hundred twenty-five".