1269228666841 has 2 divisors, whose sum is σ = 1269228666842. Its totient is φ = 1269228666840.

The previous prime is 1269228666833. The next prime is 1269228666931. The reversal of 1269228666841 is 1486668229621.

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., 896269291225 + 372959375616 = 946715^2 + 610704^2 .

It is a cyclic number.

It is not a de Polignac number, because 1269228666841 - 2³ = 1269228666833 is a prime.

It is a super-2 number, since 2×1269228666841² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1269228666841.

It is not a weakly prime, because it can be changed into another prime (1269228664841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 634614333420 + 634614333421.

It is an arithmetic number, because the mean of its divisors is an integer number (634614333421).

Almost surely, 2^{1269228666841} is an apocalyptic number.

It is an amenable number.

1269228666841 is a deficient number, since it is larger than the sum of its proper divisors (1).

1269228666841 is an equidigital number, since it uses as much as digits as its factorization.

1269228666841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23887872, while the sum is 61.

The spelling of 1269228666841 in words is "one trillion, two hundred sixty-nine billion, two hundred twenty-eight million, six hundred sixty-six thousand, eight hundred forty-one".