42844142881 has 2 divisors, whose sum is σ = 42844142882. Its totient is φ = 42844142880.

The previous prime is 42844142833. The next prime is 42844142893. The reversal of 42844142881 is 18824144824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30133835281 + 12710307600 = 173591^2 + 112740^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42844142881 is a prime.

It is a super-2 number, since 2×42844142881² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42844142821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21422071440 + 21422071441.

It is an arithmetic number, because the mean of its divisors is an integer number (21422071441).

Almost surely, 2^42844142881 is an apocalyptic number.

It is an amenable number.

42844142881 is a deficient number, since it is larger than the sum of its proper divisors (1).

42844142881 is an equidigital number, since it uses as much as digits as its factorization.

42844142881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 524288, while the sum is 46.

The spelling of 42844142881 in words is "forty-two billion, eight hundred forty-four million, one hundred forty-two thousand, eight hundred eighty-one".