41689779617 has 2 divisors, whose sum is σ = 41689779618. Its totient is φ = 41689779616.

The previous prime is 41689779539. The next prime is 41689779619. The reversal of 41689779617 is 71697798614.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26065779601 + 15624000016 = 161449^2 + 124996^2 .

It is a cyclic number.

It is not a de Polignac number, because 41689779617 - 2³² = 37394812321 is a prime.

Together with 41689779619, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (41689779619) 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 as a sum of consecutive naturals, namely, 20844889808 + 20844889809.

It is an arithmetic number, because the mean of its divisors is an integer number (20844889809).

Almost surely, 2^41689779617 is an apocalyptic number.

It is an amenable number.

41689779617 is a deficient number, since it is larger than the sum of its proper divisors (1).

41689779617 is an equidigital number, since it uses as much as digits as its factorization.

41689779617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32006016, while the sum is 65.

The spelling of 41689779617 in words is "forty-one billion, six hundred eighty-nine million, seven hundred seventy-nine thousand, six hundred seventeen".