5685164581 has 2 divisors, whose sum is σ = 5685164582. Its totient is φ = 5685164580.

The previous prime is 5685164561. The next prime is 5685164627. The reversal of 5685164581 is 1854615865.

It is a happy number.

5685164581 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4485650625 + 1199513956 = 66975^2 + 34634^2 .

It is a cyclic number.

It is not a de Polignac number, because 5685164581 - 2⁵ = 5685164549 is a prime.

It is a super-2 number, since 2×5685164581² = 64642192626113811122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5685164561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2842582290 + 2842582291.

It is an arithmetic number, because the mean of its divisors is an integer number (2842582291).

Almost surely, 2^5685164581 is an apocalyptic number.

It is an amenable number.

5685164581 is a deficient number, since it is larger than the sum of its proper divisors (1).

5685164581 is an equidigital number, since it uses as much as digits as its factorization.

5685164581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152000, while the sum is 49.

The square root of 5685164581 is about 75400.0303779780. The cubic root of 5685164581 is about 1784.7648900089.

The spelling of 5685164581 in words is "five billion, six hundred eighty-five million, one hundred sixty-four thousand, five hundred eighty-one".