3844620452681 has 2 divisors, whose sum is σ = 3844620452682. Its totient is φ = 3844620452680.

The previous prime is 3844620452611. The next prime is 3844620452683. The reversal of 3844620452681 is 1862540264483.

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., 3782947200400 + 61673252281 = 1944980^2 + 248341^2 .

It is a cyclic number.

It is not a de Polignac number, because 3844620452681 - 2¹⁰ = 3844620451657 is a prime.

It is a super-2 number, since 2×3844620452681² (a number of 26 digits) contains 22 as substring.

Together with 3844620452683, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3844620452683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1922310226340 + 1922310226341.

It is an arithmetic number, because the mean of its divisors is an integer number (1922310226341).

Almost surely, 2^{3844620452681} is an apocalyptic number.

It is an amenable number.

3844620452681 is a deficient number, since it is larger than the sum of its proper divisors (1).

3844620452681 is an equidigital number, since it uses as much as digits as its factorization.

3844620452681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8847360, while the sum is 53.

The spelling of 3844620452681 in words is "three trillion, eight hundred forty-four billion, six hundred twenty million, four hundred fifty-two thousand, six hundred eighty-one".