44398457561 has 2 divisors, whose sum is σ = 44398457562. Its totient is φ = 44398457560.

The previous prime is 44398457533. The next prime is 44398457563. The reversal of 44398457561 is 16575489344.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34840462336 + 9557995225 = 186656^2 + 97765^2 .

It is a cyclic number.

It is not a de Polignac number, because 44398457561 - 2¹⁰ = 44398456537 is a prime.

Together with 44398457563, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 44398457497 and 44398457506.

It is not a weakly prime, because it can be changed into another prime (44398457563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22199228780 + 22199228781.

It is an arithmetic number, because the mean of its divisors is an integer number (22199228781).

Almost surely, 2^44398457561 is an apocalyptic number.

It is an amenable number.

44398457561 is a deficient number, since it is larger than the sum of its proper divisors (1).

44398457561 is an equidigital number, since it uses as much as digits as its factorization.

44398457561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14515200, while the sum is 56.

The spelling of 44398457561 in words is "forty-four billion, three hundred ninety-eight million, four hundred fifty-seven thousand, five hundred sixty-one".