40771221453649 has 2 divisors, whose sum is σ = 40771221453650. Its totient is φ = 40771221453648.

The previous prime is 40771221453553. The next prime is 40771221453857. The reversal of 40771221453649 is 94635412217704.

40771221453649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30954279213649 + 9816942240000 = 5563657^2 + 3133200^2 .

It is a cyclic number.

It is not a de Polignac number, because 40771221453649 - 2¹¹ = 40771221451601 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40771221453649.

It is not a weakly prime, because it can be changed into another prime (40771221453449) 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, 20385610726824 + 20385610726825.

It is an arithmetic number, because the mean of its divisors is an integer number (20385610726825).

Almost surely, 2^{40771221453649} is an apocalyptic number.

It is an amenable number.

40771221453649 is a deficient number, since it is larger than the sum of its proper divisors (1).

40771221453649 is an equidigital number, since it uses as much as digits as its factorization.

40771221453649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10160640, while the sum is 55.

The spelling of 40771221453649 in words is "forty trillion, seven hundred seventy-one billion, two hundred twenty-one million, four hundred fifty-three thousand, six hundred forty-nine".