75744441209 has 2 divisors, whose sum is σ = 75744441210. Its totient is φ = 75744441208.

The previous prime is 75744441197. The next prime is 75744441229. The reversal of 75744441209 is 90214444757.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50526048400 + 25218392809 = 224780^2 + 158803^2 .

It is an emirp because it is prime and its reverse (90214444757) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 75744441209 - 2¹⁶ = 75744375673 is a prime.

It is not a weakly prime, because it can be changed into another prime (75744441229) 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, 37872220604 + 37872220605.

It is an arithmetic number, because the mean of its divisors is an integer number (37872220605).

Almost surely, 2^75744441209 is an apocalyptic number.

It is an amenable number.

75744441209 is a deficient number, since it is larger than the sum of its proper divisors (1).

75744441209 is an equidigital number, since it uses as much as digits as its factorization.

75744441209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1128960, while the sum is 47.

The spelling of 75744441209 in words is "seventy-five billion, seven hundred forty-four million, four hundred forty-one thousand, two hundred nine".