41644643653061 has 2 divisors, whose sum is σ = 41644643653062. Its totient is φ = 41644643653060.

The previous prime is 41644643653033. The next prime is 41644643653099. The reversal of 41644643653061 is 16035634644614.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41637466344100 + 7177308961 = 6452710^2 + 84719^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-41644643653061 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 41644643652994 and 41644643653012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (41644643653031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20822321826530 + 20822321826531.

It is an arithmetic number, because the mean of its divisors is an integer number (20822321826531).

Almost surely, 2^{41644643653061} is an apocalyptic number.

It is an amenable number.

41644643653061 is a deficient number, since it is larger than the sum of its proper divisors (1).

41644643653061 is an equidigital number, since it uses as much as digits as its factorization.

41644643653061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14929920, while the sum is 53.

The spelling of 41644643653061 in words is "forty-one trillion, six hundred forty-four billion, six hundred forty-three million, six hundred fifty-three thousand, sixty-one".