678809562201 has 27 divisors (see below), whose sum is σ = 995598381141. Its totient is φ = 445676629464.

The previous prime is 678809562191. The next prime is 678809562239. The reversal of 678809562201 is 102265908876.

The square root of 678809562201 is 823899.

It is a perfect power (a square), and thus also a powerful number.

678809562201 is a `hidden beast` number, since 6 + 7 + 8 + 8 + 0 + 9 + 5 + 622 + 0 + 1 = 666.

678809562201 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 678809562201 - 2⁵ = 678809562169 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (678809562281) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 165601650 + ... + 165605748.

Almost surely, 2^678809562201 is an apocalyptic number.

678809562201 is the 823899-th square number.

678809562201 is the 411950-th centered octagonal number.

It is an amenable number.

678809562201 is a deficient number, since it is larger than the sum of its proper divisors (316788818940).

678809562201 is an frugal number, since it uses more digits than its factorization.

678809562201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8338 (or 4169 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 54.

The spelling of 678809562201 in words is "six hundred seventy-eight billion, eight hundred nine million, five hundred sixty-two thousand, two hundred one".