42342540642439 has 2 divisors, whose sum is σ = 42342540642440. Its totient is φ = 42342540642438.

The previous prime is 42342540642379. The next prime is 42342540642463. The reversal of 42342540642439 is 93424604524324.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42342540642439 - 2²¹ = 42342538545287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42342540642139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21171270321219 + 21171270321220.

It is an arithmetic number, because the mean of its divisors is an integer number (21171270321220).

Almost surely, 2^{42342540642439} is an apocalyptic number.

42342540642439 is a deficient number, since it is larger than the sum of its proper divisors (1).

42342540642439 is an equidigital number, since it uses as much as digits as its factorization.

42342540642439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19906560, while the sum is 52.

The spelling of 42342540642439 in words is "forty-two trillion, three hundred forty-two billion, five hundred forty million, six hundred forty-two thousand, four hundred thirty-nine".