678813654673 has 16 divisors (see below), whose sum is σ = 849017033856. Its totient is φ = 527255763840.

The previous prime is 678813654587. The next prime is 678813654697. The reversal of 678813654673 is 376456318876.

It is a cyclic number.

It is not a de Polignac number, because 678813654673 - 2¹³ = 678813646481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (678813654073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14058586 + ... + 14106787.

It is an arithmetic number, because the mean of its divisors is an integer number (53063564616).

Almost surely, 2^678813654673 is an apocalyptic number.

It is an amenable number.

678813654673 is a deficient number, since it is larger than the sum of its proper divisors (170203379183).

678813654673 is a wasteful number, since it uses less digits than its factorization.

678813654673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28165704.

The product of its digits is 121927680, while the sum is 64.

The spelling of 678813654673 in words is "six hundred seventy-eight billion, eight hundred thirteen million, six hundred fifty-four thousand, six hundred seventy-three".