3844685542261 has 2 divisors, whose sum is σ = 3844685542262. Its totient is φ = 3844685542260.

The previous prime is 3844685542259. The next prime is 3844685542267. The reversal of 3844685542261 is 1622455864483.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2312026686225 + 1532658856036 = 1520535^2 + 1238006^2 .

It is a cyclic number.

It is not a de Polignac number, because 3844685542261 - 2¹ = 3844685542259 is a prime.

Together with 3844685542259, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 3844685542196 and 3844685542205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3844685542267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1922342771130 + 1922342771131.

It is an arithmetic number, because the mean of its divisors is an integer number (1922342771131).

Almost surely, 2^{3844685542261} is an apocalyptic number.

It is an amenable number.

3844685542261 is a deficient number, since it is larger than the sum of its proper divisors (1).

3844685542261 is an equidigital number, since it uses as much as digits as its factorization.

3844685542261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 44236800, while the sum is 58.

The spelling of 3844685542261 in words is "three trillion, eight hundred forty-four billion, six hundred eighty-five million, five hundred forty-two thousand, two hundred sixty-one".