681164325 has 36 divisors (see below), whose sum is σ = 1262123460. Its totient is φ = 350757120.

The previous prime is 681164311. The next prime is 681164353. The reversal of 681164325 is 523461186.

It is a happy number.

681164325 is a `hidden beast` number, since 6 + 8 + 1 + 1 + 643 + 2 + 5 = 666.

681164325 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 37933281 + 643231044 = 6159^2 + 25362^2 .

It is not a de Polignac number, because 681164325 - 2⁵ = 681164293 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 681164325.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 45672 + ... + 58721.

It is an arithmetic number, because the mean of its divisors is an integer number (35058985).

Almost surely, 2^681164325 is an apocalyptic number.

It is an amenable number.

681164325 is a deficient number, since it is larger than the sum of its proper divisors (580959135).

681164325 is a wasteful number, since it uses less digits than its factorization.

681164325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104438 (or 104430 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 681164325 is about 26099.1249853324. The cubic root of 681164325 is about 879.8675441997.

The spelling of 681164325 in words is "six hundred eighty-one million, one hundred sixty-four thousand, three hundred twenty-five".