687907677604 has 27 divisors (see below), whose sum is σ = 1400407124907. Its totient is φ = 294812599704.

The previous prime is 687907677593. The next prime is 687907677637. The reversal of 687907677604 is 406776709786.

The square root of 687907677604 is 829402.

It is a perfect power (a square), and thus also a powerful number.

It is a self number, because there is not a number n which added to its sum of digits gives 687907677604.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 11582007 + ... + 11641249.

Almost surely, 2^687907677604 is an apocalyptic number.

687907677604 is the 829402-nd square number.

It is an amenable number.

687907677604 is an abundant number, since it is smaller than the sum of its proper divisors (712499447303).

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

687907677604 is an frugal number, since it uses more digits than its factorization.

687907677604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118504 (or 59252 counting only the distinct ones).

The product of its (nonzero) digits is 149361408, while the sum is 67.

The spelling of 687907677604 in words is "six hundred eighty-seven billion, nine hundred seven million, six hundred seventy-seven thousand, six hundred four".