42243636443 has 2 divisors, whose sum is σ = 42243636444. Its totient is φ = 42243636442.

The previous prime is 42243636439. The next prime is 42243636467. The reversal of 42243636443 is 34463634224.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42243636443 - 2² = 42243636439 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42243636443.

It is not a weakly prime, because it can be changed into another prime (42243636943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21121818221 + 21121818222.

It is an arithmetic number, because the mean of its divisors is an integer number (21121818222).

Almost surely, 2^42243636443 is an apocalyptic number.

42243636443 is a deficient number, since it is larger than the sum of its proper divisors (1).

42243636443 is an equidigital number, since it uses as much as digits as its factorization.

42243636443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 995328, while the sum is 41.

The spelling of 42243636443 in words is "forty-two billion, two hundred forty-three million, six hundred thirty-six thousand, four hundred forty-three".