685822484736 has 351 divisors, whose sum is σ = 2082776822623. Its totient is φ = 225387671040.

The previous prime is 685822484689. The next prime is 685822484741. The reversal of 685822484736 is 637484228586.

The square root of 685822484736 is 828144.

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

685822484736 is a `hidden beast` number, since 6 + 8 + 5 + 82 + 2 + 484 + 73 + 6 = 666.

It is a Duffinian number.

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 38 ways as a sum of consecutive naturals, for example, 9659471581 + ... + 9659471651.

Almost surely, 2^685822484736 is an apocalyptic number.

685822484736 is the 828144-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 685822484736

685822484736 is an abundant number, since it is smaller than the sum of its proper divisors (1396954337887).

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

685822484736 is an frugal number, since it uses more digits than its factorization.

685822484736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194 (or 76 counting only the distinct ones).

The product of its digits is 123863040, while the sum is 63.

The spelling of 685822484736 in words is "six hundred eighty-five billion, eight hundred twenty-two million, four hundred eighty-four thousand, seven hundred thirty-six".