440130663355661 has 2 divisors, whose sum is σ = 440130663355662. Its totient is φ = 440130663355660.

The previous prime is 440130663355631. The next prime is 440130663355727. The reversal of 440130663355661 is 166553366031044.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 321183065539561 + 118947597816100 = 17921581^2 + 10906310^2 .

It is a cyclic number.

It is not a de Polignac number, because 440130663355661 - 2⁶ = 440130663355597 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (440130663355631) 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, 220065331677830 + 220065331677831.

It is an arithmetic number, because the mean of its divisors is an integer number (220065331677831).

Almost surely, 2^{440130663355661} is an apocalyptic number.

It is an amenable number.

440130663355661 is a deficient number, since it is larger than the sum of its proper divisors (1).

440130663355661 is an equidigital number, since it uses as much as digits as its factorization.

440130663355661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13996800, while the sum is 53.

The spelling of 440130663355661 in words is "four hundred forty trillion, one hundred thirty billion, six hundred sixty-three million, three hundred fifty-five thousand, six hundred sixty-one".