1226286586661 has 2 divisors, whose sum is σ = 1226286586662. Its totient is φ = 1226286586660.

The previous prime is 1226286586633. The next prime is 1226286586709. The reversal of 1226286586661 is 1666856826221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 957139372225 + 269147214436 = 978335^2 + 518794^2 .

It is an emirp because it is prime and its reverse (1666856826221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1226286586661 - 2³⁰ = 1225212844837 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1226286586661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1226286586621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 613143293330 + 613143293331.

It is an arithmetic number, because the mean of its divisors is an integer number (613143293331).

Almost surely, 2^{1226286586661} is an apocalyptic number.

It is an amenable number.

1226286586661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1226286586661 is an equidigital number, since it uses as much as digits as its factorization.

1226286586661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19906560, while the sum is 59.

The spelling of 1226286586661 in words is "one trillion, two hundred twenty-six billion, two hundred eighty-six million, five hundred eighty-six thousand, six hundred sixty-one".