841561023791 has 2 divisors, whose sum is σ = 841561023792. Its totient is φ = 841561023790.

The previous prime is 841561023703. The next prime is 841561023811. The reversal of 841561023791 is 197320165148.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 841561023791 - 2¹⁰ = 841561022767 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (841561023701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420780511895 + 420780511896.

It is an arithmetic number, because the mean of its divisors is an integer number (420780511896).

It is a 1-persistent number, because it is pandigital, but 2⋅841561023791 = 1683122047582 is not.

Almost surely, 2^841561023791 is an apocalyptic number.

841561023791 is a deficient number, since it is larger than the sum of its proper divisors (1).

841561023791 is an equidigital number, since it uses as much as digits as its factorization.

841561023791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 47.

The spelling of 841561023791 in words is "eight hundred forty-one billion, five hundred sixty-one million, twenty-three thousand, seven hundred ninety-one".