41579581609 has 2 divisors, whose sum is σ = 41579581610. Its totient is φ = 41579581608.

The previous prime is 41579581573. The next prime is 41579581643. The reversal of 41579581609 is 90618597514.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40482647209 + 1096934400 = 201203^2 + 33120^2 .

It is a cyclic number.

It is not a de Polignac number, because 41579581609 - 2⁷ = 41579581481 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 41579581609.

It is not a weakly prime, because it can be changed into another prime (41579581909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20789790804 + 20789790805.

It is an arithmetic number, because the mean of its divisors is an integer number (20789790805).

Almost surely, 2^41579581609 is an apocalyptic number.

It is an amenable number.

41579581609 is a deficient number, since it is larger than the sum of its proper divisors (1).

41579581609 is an equidigital number, since it uses as much as digits as its factorization.

41579581609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2721600, while the sum is 55.

The spelling of 41579581609 in words is "forty-one billion, five hundred seventy-nine million, five hundred eighty-one thousand, six hundred nine".