42844532791 has 2 divisors, whose sum is σ = 42844532792. Its totient is φ = 42844532790.

The previous prime is 42844532747. The next prime is 42844532833. The reversal of 42844532791 is 19723544824.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42844532791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42844512791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21422266395 + 21422266396.

It is an arithmetic number, because the mean of its divisors is an integer number (21422266396).

Almost surely, 2^42844532791 is an apocalyptic number.

42844532791 is a deficient number, since it is larger than the sum of its proper divisors (1).

42844532791 is an equidigital number, since it uses as much as digits as its factorization.

42844532791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1935360, while the sum is 49.

The spelling of 42844532791 in words is "forty-two billion, eight hundred forty-four million, five hundred thirty-two thousand, seven hundred ninety-one".