41640322609 has 4 divisors (see below), whose sum is σ = 41649238116. Its totient is φ = 41631407104.

The previous prime is 41640322571. The next prime is 41640322637. The reversal of 41640322609 is 90622304614.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 40828243600 + 812079009 = 202060^2 + 28497^2 .

It is a cyclic number.

It is not a de Polignac number, because 41640322609 - 2²¹ = 41638225457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (41640302609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4450744 + ... + 4460089.

It is an arithmetic number, because the mean of its divisors is an integer number (10412309529).

Almost surely, 2^41640322609 is an apocalyptic number.

It is an amenable number.

41640322609 is a deficient number, since it is larger than the sum of its proper divisors (8915507).

41640322609 is an equidigital number, since it uses as much as digits as its factorization.

41640322609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8915506.

The product of its (nonzero) digits is 62208, while the sum is 37.

The spelling of 41640322609 in words is "forty-one billion, six hundred forty million, three hundred twenty-two thousand, six hundred nine".