678423651713 has 8 divisors (see below), whose sum is σ = 687805414536. Its totient is φ = 669044275200.

The previous prime is 678423651701. The next prime is 678423651767. The reversal of 678423651713 is 317156324876.

It can be written as a sum of positive squares in 4 ways, for example, as 45519075904 + 632904575809 = 213352^2 + 795553^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 678423651713 - 2⁸ = 678423651457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (678423651413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20228 + ... + 1165013.

It is an arithmetic number, because the mean of its divisors is an integer number (85975676817).

Almost surely, 2^678423651713 is an apocalyptic number.

It is an amenable number.

678423651713 is a deficient number, since it is larger than the sum of its proper divisors (9381762823).

678423651713 is a wasteful number, since it uses less digits than its factorization.

678423651713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1193155.

The product of its digits is 5080320, while the sum is 53.

The spelling of 678423651713 in words is "six hundred seventy-eight billion, four hundred twenty-three million, six hundred fifty-one thousand, seven hundred thirteen".