687264212196 has 81 divisors (see below), whose sum is σ = 1747686403099. Its totient is φ = 227720197632.

The previous prime is 687264212101. The next prime is 687264212221. The reversal of 687264212196 is 691212462786.

The square root of 687264212196 is 829014.

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

687264212196 is a `hidden beast` number, since 6 + 8 + 7 + 26 + 421 + 2 + 196 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 27660346596 + 659603865600 = 166314^2 + 812160^2 .

It is a Duffinian number.

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, 1158961276 + ... + 1158961868.

Almost surely, 2^687264212196 is an apocalyptic number.

687264212196 is the 829014-th square number.

It is an amenable number.

687264212196 is an abundant number, since it is smaller than the sum of its proper divisors (1060422190903).

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

687264212196 is an equidigital number, since it uses as much as digits as its factorization.

687264212196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1662 (or 831 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 54.

The spelling of 687264212196 in words is "six hundred eighty-seven billion, two hundred sixty-four million, two hundred twelve thousand, one hundred ninety-six".