844729744457 has 2 divisors, whose sum is σ = 844729744458. Its totient is φ = 844729744456.

The previous prime is 844729744423. The next prime is 844729744487. The reversal of 844729744457 is 754447927448.

844729744457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 839759635456 + 4970109001 = 916384^2 + 70499^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-844729744457 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 844729744393 and 844729744402.

It is not a weakly prime, because it can be changed into another prime (844729744487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422364872228 + 422364872229.

It is an arithmetic number, because the mean of its divisors is an integer number (422364872229).

Almost surely, 2^844729744457 is an apocalyptic number.

It is an amenable number.

844729744457 is a deficient number, since it is larger than the sum of its proper divisors (1).

844729744457 is an equidigital number, since it uses as much as digits as its factorization.

844729744457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 252887040, while the sum is 65.

The spelling of 844729744457 in words is "eight hundred forty-four billion, seven hundred twenty-nine million, seven hundred forty-four thousand, four hundred fifty-seven".