865824909041 has 2 divisors, whose sum is σ = 865824909042. Its totient is φ = 865824909040.

The previous prime is 865824909031. The next prime is 865824909073. The reversal of 865824909041 is 140909428568.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 630231164641 + 235593744400 = 793871^2 + 485380^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-865824909041 is a prime.

It is not a weakly prime, because it can be changed into another prime (865824909011) 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, 432912454520 + 432912454521.

It is an arithmetic number, because the mean of its divisors is an integer number (432912454521).

Almost surely, 2^865824909041 is an apocalyptic number.

It is an amenable number.

865824909041 is a deficient number, since it is larger than the sum of its proper divisors (1).

865824909041 is an equidigital number, since it uses as much as digits as its factorization.

865824909041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4976640, while the sum is 56.

The spelling of 865824909041 in words is "eight hundred sixty-five billion, eight hundred twenty-four million, nine hundred nine thousand, forty-one".