4085492561 has 2 divisors, whose sum is σ = 4085492562. Its totient is φ = 4085492560.

The previous prime is 4085492533. The next prime is 4085492569. The reversal of 4085492561 is 1652945804.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4078099600 + 7392961 = 63860^2 + 2719^2 .

It is a cyclic number.

It is not a de Polignac number, because 4085492561 - 2⁶ = 4085492497 is a prime.

It is not a weakly prime, because it can be changed into another prime (4085492569) 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, 2042746280 + 2042746281.

It is an arithmetic number, because the mean of its divisors is an integer number (2042746281).

Almost surely, 2^4085492561 is an apocalyptic number.

It is an amenable number.

4085492561 is a deficient number, since it is larger than the sum of its proper divisors (1).

4085492561 is an equidigital number, since it uses as much as digits as its factorization.

4085492561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 345600, while the sum is 44.

The square root of 4085492561 is about 63917.8579193640. The cubic root of 4085492561 is about 1598.6306723031.

The spelling of 4085492561 in words is "four billion, eighty-five million, four hundred ninety-two thousand, five hundred sixty-one".