75444244457 has 2 divisors, whose sum is σ = 75444244458. Its totient is φ = 75444244456.

The previous prime is 75444244399. The next prime is 75444244487.

75444244457 is nontrivially palindromic in base 10.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75019018816 + 425225641 = 273896^2 + 20621^2 .

It is a palprime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75444244457 is a prime.

It is not a weakly prime, because it can be changed into another prime (75444244487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37722122228 + 37722122229.

It is an arithmetic number, because the mean of its divisors is an integer number (37722122229).

Almost surely, 2^75444244457 is an apocalyptic number.

It is an amenable number.

75444244457 is a deficient number, since it is larger than the sum of its proper divisors (1).

75444244457 is an equidigital number, since it uses as much as digits as its factorization.

75444244457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10035200, while the sum is 50.

The spelling of 75444244457 in words is "seventy-five billion, four hundred forty-four million, two hundred forty-four thousand, four hundred fifty-seven".