678140380809 has 12 divisors (see below), whose sum is σ = 1022124632256. Its totient is φ = 432437344152.

The previous prime is 678140380777. The next prime is 678140380811. The reversal of 678140380809 is 908083041876.

678140380809 is a `hidden beast` number, since 6 + 7 + 81 + 403 + 80 + 80 + 9 = 666.

It is not a de Polignac number, because 678140380809 - 2⁵ = 678140380777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (678140380609) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 1638020037 + ... + 1638020450.

It is an arithmetic number, because the mean of its divisors is an integer number (85177052688).

Almost surely, 2^678140380809 is an apocalyptic number.

678140380809 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

It is an amenable number.

678140380809 is a deficient number, since it is larger than the sum of its proper divisors (343984251447).

678140380809 is a wasteful number, since it uses less digits than its factorization.

678140380809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3276040516 (or 3276040513 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 54.

The spelling of 678140380809 in words is "six hundred seventy-eight billion, one hundred forty million, three hundred eighty thousand, eight hundred nine".