41664444204561 has 4 divisors (see below), whose sum is σ = 55552592272752. Its totient is φ = 27776296136372.

The previous prime is 41664444204557. The next prime is 41664444204563. The reversal of 41664444204561 is 16540244446614.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 41664444204561 - 2² = 41664444204557 is a prime.

It is not an unprimeable number, because it can be changed into a prime (41664444204563) 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, 6944074034091 + ... + 6944074034096.

It is an arithmetic number, because the mean of its divisors is an integer number (13888148068188).

Almost surely, 2^{41664444204561} is an apocalyptic number.

It is an amenable number.

41664444204561 is a deficient number, since it is larger than the sum of its proper divisors (13888148068191).

41664444204561 is a wasteful number, since it uses less digits than its factorization.

41664444204561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13888148068190.

The product of its (nonzero) digits is 8847360, while the sum is 51.

The spelling of 41664444204561 in words is "forty-one trillion, six hundred sixty-four billion, four hundred forty-four million, two hundred four thousand, five hundred sixty-one".