1663278144439 has 2 divisors, whose sum is σ = 1663278144440. Its totient is φ = 1663278144438.

The previous prime is 1663278144427. The next prime is 1663278144503. The reversal of 1663278144439 is 9344418723661.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1663278144439 - 2²³ = 1663269755831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1663278144239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 831639072219 + 831639072220.

It is an arithmetic number, because the mean of its divisors is an integer number (831639072220).

Almost surely, 2^{1663278144439} is an apocalyptic number.

1663278144439 is a deficient number, since it is larger than the sum of its proper divisors (1).

1663278144439 is an equidigital number, since it uses as much as digits as its factorization.

1663278144439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20901888, while the sum is 58.

The spelling of 1663278144439 in words is "one trillion, six hundred sixty-three billion, two hundred seventy-eight million, one hundred forty-four thousand, four hundred thirty-nine".