41644870405 has 4 divisors (see below), whose sum is σ = 49973844492. Its totient is φ = 33315896320.

The previous prime is 41644870381. The next prime is 41644870439. The reversal of 41644870405 is 50407844614.

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 27491961249 + 14152909156 = 165807^2 + 118966^2 .

It is not a de Polignac number, because 41644870405 - 2⁷ = 41644870277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4164487036 + ... + 4164487045.

It is an arithmetic number, because the mean of its divisors is an integer number (12493461123).

Almost surely, 2^41644870405 is an apocalyptic number.

It is an amenable number.

41644870405 is a deficient number, since it is larger than the sum of its proper divisors (8328974087).

41644870405 is an equidigital number, since it uses as much as digits as its factorization.

41644870405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8328974086.

The product of its (nonzero) digits is 430080, while the sum is 43.

The spelling of 41644870405 in words is "forty-one billion, six hundred forty-four million, eight hundred seventy thousand, four hundred five".