687910995216 has 75 divisors (see below), whose sum is σ = 1991100422311. Its totient is φ = 229293712224.

The previous prime is 687910995209. The next prime is 687910995217. The reversal of 687910995216 is 612599019786.

The square root of 687910995216 is 829404.

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

687910995216 is a `hidden beast` number, since 6 + 8 + 7 + 9 + 10 + 99 + 521 + 6 = 666.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (687910995217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 29847025 + ... + 29870063.

Almost surely, 2^687910995216 is an apocalyptic number.

687910995216 is the 829404-th square number.

It is an amenable number.

687910995216 is an abundant number, since it is smaller than the sum of its proper divisors (1303189427095).

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

687910995216 is an frugal number, since it uses more digits than its factorization.

687910995216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46098 (or 23044 counting only the distinct ones).

The product of its (nonzero) digits is 14696640, while the sum is 63.

The spelling of 687910995216 in words is "six hundred eighty-seven billion, nine hundred ten million, nine hundred ninety-five thousand, two hundred sixteen".