440552781317081 has 2 divisors, whose sum is σ = 440552781317082. Its totient is φ = 440552781317080.

The previous prime is 440552781317071. The next prime is 440552781317123. The reversal of 440552781317081 is 180713187255044.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 440275377907600 + 277403409481 = 20982740^2 + 526691^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-440552781317081 is a prime.

It is a super-2 number, since 2×440552781317081² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (440552781317071) 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, 220276390658540 + 220276390658541.

It is an arithmetic number, because the mean of its divisors is an integer number (220276390658541).

Almost surely, 2^{440552781317081} is an apocalyptic number.

It is an amenable number.

440552781317081 is a deficient number, since it is larger than the sum of its proper divisors (1).

440552781317081 is an equidigital number, since it uses as much as digits as its factorization.

440552781317081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7526400, while the sum is 56.

The spelling of 440552781317081 in words is "four hundred forty trillion, five hundred fifty-two billion, seven hundred eighty-one million, three hundred seventeen thousand, eighty-one".