41581649 has 2 divisors, whose sum is σ = 41581650. Its totient is φ = 41581648.

The previous prime is 41581619. The next prime is 41581691. The reversal of 41581649 is 94618514.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40551424 + 1030225 = 6368^2 + 1015^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-41581649 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (41581619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20790824 + 20790825.

It is an arithmetic number, because the mean of its divisors is an integer number (20790825).

Almost surely, 2^41581649 is an apocalyptic number.

It is an amenable number.

41581649 is a deficient number, since it is larger than the sum of its proper divisors (1).

41581649 is an equidigital number, since it uses as much as digits as its factorization.

41581649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 38.

The square root of 41581649 is about 6448.3834408323. The cubic root of 41581649 is about 346.4446847907. Note that the first 3 decimals are identical.

The spelling of 41581649 in words is "forty-one million, five hundred eighty-one thousand, six hundred forty-nine".