678043334137 has 4 divisors (see below), whose sum is σ = 730200513700. Its totient is φ = 625886154576.

The previous prime is 678043334093. The next prime is 678043334201. The reversal of 678043334137 is 731433340876.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 251744031081 + 426299303056 = 501741^2 + 652916^2 .

It is a cyclic number.

It is not a de Polignac number, because 678043334137 - 2¹⁹ = 678042809849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (678043304137) 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, 26078589762 + ... + 26078589787.

It is an arithmetic number, because the mean of its divisors is an integer number (182550128425).

Almost surely, 2^678043334137 is an apocalyptic number.

It is an amenable number.

678043334137 is a deficient number, since it is larger than the sum of its proper divisors (52157179563).

678043334137 is a wasteful number, since it uses less digits than its factorization.

678043334137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52157179562.

The product of its (nonzero) digits is 3048192, while the sum is 49.

The spelling of 678043334137 in words is "six hundred seventy-eight billion, forty-three million, three hundred thirty-four thousand, one hundred thirty-seven".