3844539637481 has 2 divisors, whose sum is σ = 3844539637482. Its totient is φ = 3844539637480.

The previous prime is 3844539637453. The next prime is 3844539637501. The reversal of 3844539637481 is 1847369354483.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1940125837456 + 1904413800025 = 1392884^2 + 1380005^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3844539637481 is a prime.

It is a super-2 number, since 2×3844539637481² (a number of 26 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (3844539637451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1922269818740 + 1922269818741.

It is an arithmetic number, because the mean of its divisors is an integer number (1922269818741).

Almost surely, 2^{3844539637481} is an apocalyptic number.

It is an amenable number.

3844539637481 is a deficient number, since it is larger than the sum of its proper divisors (1).

3844539637481 is an equidigital number, since it uses as much as digits as its factorization.

3844539637481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 209018880, while the sum is 65.

The spelling of 3844539637481 in words is "three trillion, eight hundred forty-four billion, five hundred thirty-nine million, six hundred thirty-seven thousand, four hundred eighty-one".