43841319617 has 2 divisors, whose sum is σ = 43841319618. Its totient is φ = 43841319616.

The previous prime is 43841319563. The next prime is 43841319619. The reversal of 43841319617 is 71691314834.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37453473841 + 6387845776 = 193529^2 + 79924^2 .

It is a cyclic number.

It is not a de Polignac number, because 43841319617 - 2¹⁸ = 43841057473 is a prime.

It is a super-2 number, since 2×43841319617² (a number of 22 digits) contains 22 as substring.

Together with 43841319619, 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 (43841319619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21920659808 + 21920659809.

It is an arithmetic number, because the mean of its divisors is an integer number (21920659809).

Almost surely, 2^43841319617 is an apocalyptic number.

It is an amenable number.

43841319617 is a deficient number, since it is larger than the sum of its proper divisors (1).

43841319617 is an equidigital number, since it uses as much as digits as its factorization.

43841319617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 47.

The spelling of 43841319617 in words is "forty-three billion, eight hundred forty-one million, three hundred nineteen thousand, six hundred seventeen".