40865866841 has 2 divisors, whose sum is σ = 40865866842. Its totient is φ = 40865866840.

The previous prime is 40865866831. The next prime is 40865866879. The reversal of 40865866841 is 14866856804.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34449216025 + 6416650816 = 185605^2 + 80104^2 .

It is a cyclic number.

It is not a de Polignac number, because 40865866841 - 2³⁰ = 39792125017 is a prime.

It is not a weakly prime, because it can be changed into another prime (40865866831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20432933420 + 20432933421.

It is an arithmetic number, because the mean of its divisors is an integer number (20432933421).

Almost surely, 2^40865866841 is an apocalyptic number.

It is an amenable number.

40865866841 is a deficient number, since it is larger than the sum of its proper divisors (1).

40865866841 is an equidigital number, since it uses as much as digits as its factorization.

40865866841 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8847360, while the sum is 56.

The spelling of 40865866841 in words is "forty billion, eight hundred sixty-five million, eight hundred sixty-six thousand, eight hundred forty-one".