68378209684 has 12 divisors (see below), whose sum is σ = 120322983508. Its totient is φ = 34000214400.

The previous prime is 68378209661. The next prime is 68378209687. The reversal of 68378209684 is 48690287386.

It can be written as a sum of positive squares in 2 ways, for example, as 26512957584 + 41865252100 = 162828^2 + 204610^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68378209687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47221797 + ... + 47223244.

Almost surely, 2^68378209684 is an apocalyptic number.

It is an amenable number.

68378209684 is a deficient number, since it is larger than the sum of its proper divisors (51944773824).

68378209684 is a wasteful number, since it uses less digits than its factorization.

68378209684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94445226 (or 94445224 counting only the distinct ones).

The product of its (nonzero) digits is 27869184, while the sum is 61.

The spelling of 68378209684 in words is "sixty-eight billion, three hundred seventy-eight million, two hundred nine thousand, six hundred eighty-four".