687632343696 has 135 divisors (see below), whose sum is σ = 2031589925001. Its totient is φ = 217087350912.

The previous prime is 687632343653. The next prime is 687632343721. The reversal of 687632343696 is 696343236786.

The square root of 687632343696 is 829236.

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

687632343696 is a `hidden beast` number, since 6 + 87 + 6 + 32 + 3 + 436 + 96 = 666.

It can be written as a sum of positive squares in only one way, i.e., 18403635600 + 669228708096 = 135660^2 + 818064^2 .

It is an unprimeable number.

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 26 ways as a sum of consecutive naturals, for example, 189063990 + ... + 189067626.

Almost surely, 2^687632343696 is an apocalyptic number.

687632343696 is the 829236-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 687632343696

687632343696 is an abundant number, since it is smaller than the sum of its proper divisors (1343957581305).

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

687632343696 is an equidigital number, since it uses as much as digits as its factorization.

687632343696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7326 (or 3661 counting only the distinct ones).

The product of its digits is 141087744, while the sum is 63.

The spelling of 687632343696 in words is "six hundred eighty-seven billion, six hundred thirty-two million, three hundred forty-three thousand, six hundred ninety-six".