41644109989 has 2 divisors, whose sum is σ = 41644109990. Its totient is φ = 41644109988.

The previous prime is 41644109987. The next prime is 41644110023. The reversal of 41644109989 is 98990144614.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40173387489 + 1470722500 = 200433^2 + 38350^2 .

It is a cyclic number.

It is not a de Polignac number, because 41644109989 - 2¹ = 41644109987 is a prime.

Together with 41644109987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (41644109981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20822054994 + 20822054995.

It is an arithmetic number, because the mean of its divisors is an integer number (20822054995).

Almost surely, 2^41644109989 is an apocalyptic number.

It is an amenable number.

41644109989 is a deficient number, since it is larger than the sum of its proper divisors (1).

41644109989 is an equidigital number, since it uses as much as digits as its factorization.

41644109989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2239488, while the sum is 55.

The spelling of 41644109989 in words is "forty-one billion, six hundred forty-four million, one hundred nine thousand, nine hundred eighty-nine".