44643555534661 has 2 divisors, whose sum is σ = 44643555534662. Its totient is φ = 44643555534660.

The previous prime is 44643555534631. The next prime is 44643555534667. The reversal of 44643555534661 is 16643555534644.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37188116418436 + 7455439116225 = 6098206^2 + 2730465^2 .

It is a cyclic number.

It is not a de Polignac number, because 44643555534661 - 2¹⁷ = 44643555403589 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 44643555534661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (44643555534667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22321777767330 + 22321777767331.

It is an arithmetic number, because the mean of its divisors is an integer number (22321777767331).

Almost surely, 2^{44643555534661} is an apocalyptic number.

It is an amenable number.

44643555534661 is a deficient number, since it is larger than the sum of its proper divisors (1).

44643555534661 is an equidigital number, since it uses as much as digits as its factorization.

44643555534661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 311040000, while the sum is 61.

The spelling of 44643555534661 in words is "forty-four trillion, six hundred forty-three billion, five hundred fifty-five million, five hundred thirty-four thousand, six hundred sixty-one".