40042444020361 has 2 divisors, whose sum is σ = 40042444020362. Its totient is φ = 40042444020360.

The previous prime is 40042444020349. The next prime is 40042444020427. The reversal of 40042444020361 is 16302044424004.

40042444020361 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., 39613869542025 + 428574478336 = 6293955^2 + 654656^2 .

It is a cyclic number.

It is not a de Polignac number, because 40042444020361 - 2¹⁷ = 40042443889289 is a prime.

It is not a weakly prime, because it can be changed into another prime (40042444060361) 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, 20021222010180 + 20021222010181.

It is an arithmetic number, because the mean of its divisors is an integer number (20021222010181).

Almost surely, 2^{40042444020361} is an apocalyptic number.

It is an amenable number.

40042444020361 is a deficient number, since it is larger than the sum of its proper divisors (1).

40042444020361 is an equidigital number, since it uses as much as digits as its factorization.

40042444020361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 73728, while the sum is 34.

Adding to 40042444020361 its reverse (16302044424004), we get a palindrome (56344488444365).

The spelling of 40042444020361 in words is "forty trillion, forty-two billion, four hundred forty-four million, twenty thousand, three hundred sixty-one".