1128643444477 has 2 divisors, whose sum is σ = 1128643444478. Its totient is φ = 1128643444476.

The previous prime is 1128643444471. The next prime is 1128643444541. The reversal of 1128643444477 is 7744443468211.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 688943160676 + 439700283801 = 830026^2 + 663099^2 .

It is an emirp because it is prime and its reverse (7744443468211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1128643444477 - 2⁷ = 1128643444349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1128643444471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 564321722238 + 564321722239.

It is an arithmetic number, because the mean of its divisors is an integer number (564321722239).

Almost surely, 2^{1128643444477} is an apocalyptic number.

It is an amenable number.

1128643444477 is a deficient number, since it is larger than the sum of its proper divisors (1).

1128643444477 is an equidigital number, since it uses as much as digits as its factorization.

1128643444477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14450688, while the sum is 55.

The spelling of 1128643444477 in words is "one trillion, one hundred twenty-eight billion, six hundred forty-three million, four hundred forty-four thousand, four hundred seventy-seven".