42865133839109 has 2 divisors, whose sum is σ = 42865133839110. Its totient is φ = 42865133839108.

The previous prime is 42865133839097. The next prime is 42865133839111. The reversal of 42865133839109 is 90193833156824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36774218430625 + 6090915408484 = 6064175^2 + 2467978^2 .

It is a cyclic number.

It is not a de Polignac number, because 42865133839109 - 2⁴⁴ = 25272947794693 is a prime.

It is a super-4 number, since 4×42865133839109⁴ (a number of 56 digits) contains 4444 as substring. Note that it is a super-d number also for d = 3.

Together with 42865133839111, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42865133439109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21432566919554 + 21432566919555.

It is an arithmetic number, because the mean of its divisors is an integer number (21432566919555).

Almost surely, 2^{42865133839109} is an apocalyptic number.

It is an amenable number.

42865133839109 is a deficient number, since it is larger than the sum of its proper divisors (1).

42865133839109 is an equidigital number, since it uses as much as digits as its factorization.

42865133839109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 33592320, while the sum is 62.

The spelling of 42865133839109 in words is "forty-two trillion, eight hundred sixty-five billion, one hundred thirty-three million, eight hundred thirty-nine thousand, one hundred nine".