678303522861 has 16 divisors (see below), whose sum is σ = 919899961920. Its totient is φ = 444457489280.

The previous prime is 678303522839. The next prime is 678303522877. The reversal of 678303522861 is 168225303876.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 678303522861 - 2³⁰ = 677229781037 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678303522361) 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, 642601 + ... + 1330241.

It is an arithmetic number, because the mean of its divisors is an integer number (57493747620).

Almost surely, 2^678303522861 is an apocalyptic number.

It is an amenable number.

678303522861 is a deficient number, since it is larger than the sum of its proper divisors (241596439059).

678303522861 is a wasteful number, since it uses less digits than its factorization.

678303522861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693276.

The product of its (nonzero) digits is 2903040, while the sum is 51.

The spelling of 678303522861 in words is "six hundred seventy-eight billion, three hundred three million, five hundred twenty-two thousand, eight hundred sixty-one".