1280791669441 has 2 divisors, whose sum is σ = 1280791669442. Its totient is φ = 1280791669440.

The previous prime is 1280791669433. The next prime is 1280791669453. The reversal of 1280791669441 is 1449661970821.

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., 1257827297841 + 22964371600 = 1121529^2 + 151540^2 .

It is a cyclic number.

It is not a de Polignac number, because 1280791669441 - 2³ = 1280791669433 is a prime.

It is not a weakly prime, because it can be changed into another prime (1280791669481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 640395834720 + 640395834721.

It is an arithmetic number, because the mean of its divisors is an integer number (640395834721).

Almost surely, 2^{1280791669441} is an apocalyptic number.

It is an amenable number.

1280791669441 is a deficient number, since it is larger than the sum of its proper divisors (1).

1280791669441 is an equidigital number, since it uses as much as digits as its factorization.

1280791669441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5225472, while the sum is 58.

The spelling of 1280791669441 in words is "one trillion, two hundred eighty billion, seven hundred ninety-one million, six hundred sixty-nine thousand, four hundred forty-one".