684800064884 has 12 divisors (see below), whose sum is σ = 1290584737764. Its totient is φ = 316061568384.

The previous prime is 684800064881. The next prime is 684800064929. The reversal of 684800064884 is 488460008486.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 346108656100 + 338691408784 = 588310^2 + 581972^2 .

It is a super-2 number, since 2×684800064884² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684800064881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6584615957 + ... + 6584616060.

It is an arithmetic number, because the mean of its divisors is an integer number (107548728147).

Almost surely, 2^684800064884 is an apocalyptic number.

It is an amenable number.

684800064884 is a deficient number, since it is larger than the sum of its proper divisors (605784672880).

684800064884 is a wasteful number, since it uses less digits than its factorization.

684800064884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13169232034 (or 13169232032 counting only the distinct ones).

The product of its (nonzero) digits is 9437184, while the sum is 56.

The spelling of 684800064884 in words is "six hundred eighty-four billion, eight hundred million, sixty-four thousand, eight hundred eighty-four".