44421774791 has 2 divisors, whose sum is σ = 44421774792. Its totient is φ = 44421774790.

The previous prime is 44421774779. The next prime is 44421774841. The reversal of 44421774791 is 19747712444.

It is an a-pointer prime, because the next prime (44421774841) can be obtained adding 44421774791 to its sum of digits (50).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-44421774791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44421774731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22210887395 + 22210887396.

It is an arithmetic number, because the mean of its divisors is an integer number (22210887396).

Almost surely, 2^44421774791 is an apocalyptic number.

44421774791 is a deficient number, since it is larger than the sum of its proper divisors (1).

44421774791 is an equidigital number, since it uses as much as digits as its factorization.

44421774791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1580544, while the sum is 50.

The spelling of 44421774791 in words is "forty-four billion, four hundred twenty-one million, seven hundred seventy-four thousand, seven hundred ninety-one".