687261470688 has 192 divisors, whose sum is σ = 2272322707200. Its totient is φ = 200335265280.

The previous prime is 687261470681. The next prime is 687261470719. The reversal of 687261470688 is 886074162786.

687261470688 is a `hidden beast` number, since 6 + 8 + 7 + 2 + 614 + 7 + 0 + 6 + 8 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687261470681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1396798 + ... + 1823613.

It is an arithmetic number, because the mean of its divisors is an integer number (11835014100).

Almost surely, 2^687261470688 is an apocalyptic number.

It is an amenable number.

687261470688 is an abundant number, since it is smaller than the sum of its proper divisors (1585061236512).

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

687261470688 is a wasteful number, since it uses less digits than its factorization.

687261470688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3220462 (or 3220448 counting only the distinct ones).

The product of its (nonzero) digits is 43352064, while the sum is 63.

The spelling of 687261470688 in words is "six hundred eighty-seven billion, two hundred sixty-one million, four hundred seventy thousand, six hundred eighty-eight".