943761242561 has 2 divisors, whose sum is σ = 943761242562. Its totient is φ = 943761242560.

The previous prime is 943761242549. The next prime is 943761242563. The reversal of 943761242561 is 165242167349.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 743464715536 + 200296527025 = 862244^2 + 447545^2 .

It is a cyclic number.

It is not a de Polignac number, because 943761242561 - 2⁶ = 943761242497 is a prime.

Together with 943761242563, 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 (943761242563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 471880621280 + 471880621281.

It is an arithmetic number, because the mean of its divisors is an integer number (471880621281).

Almost surely, 2^943761242561 is an apocalyptic number.

It is an amenable number.

943761242561 is a deficient number, since it is larger than the sum of its proper divisors (1).

943761242561 is an equidigital number, since it uses as much as digits as its factorization.

943761242561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2177280, while the sum is 50.

The spelling of 943761242561 in words is "nine hundred forty-three billion, seven hundred sixty-one million, two hundred forty-two thousand, five hundred sixty-one".