40644412841 has 2 divisors, whose sum is σ = 40644412842. Its totient is φ = 40644412840.

The previous prime is 40644412819. The next prime is 40644412871. The reversal of 40644412841 is 14821444604.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23508555625 + 17135857216 = 153325^2 + 130904^2 .

It is a cyclic number.

It is not a de Polignac number, because 40644412841 - 2²² = 40640218537 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40644412795 and 40644412804.

It is not a weakly prime, because it can be changed into another prime (40644412801) 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, 20322206420 + 20322206421.

It is an arithmetic number, because the mean of its divisors is an integer number (20322206421).

Almost surely, 2^40644412841 is an apocalyptic number.

It is an amenable number.

40644412841 is a deficient number, since it is larger than the sum of its proper divisors (1).

40644412841 is an equidigital number, since it uses as much as digits as its factorization.

40644412841 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 98304, while the sum is 38.

The spelling of 40644412841 in words is "forty billion, six hundred forty-four million, four hundred twelve thousand, eight hundred forty-one".