1280111061447 has 6 divisors (see below), whose sum is σ = 1849049310992. Its totient is φ = 853407374292.

The previous prime is 1280111061421. The next prime is 1280111061469. The reversal of 1280111061447 is 7441601110821.

It is a happy number.

1280111061447 is a `hidden beast` number, since 1 + 28 + 0 + 1 + 1 + 10 + 614 + 4 + 7 = 666.

It is not a de Polignac number, because 1280111061447 - 2¹¹ = 1280111059399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280111060447) 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 in 5 ways as a sum of consecutive naturals, for example, 71117281183 + ... + 71117281200.

Almost surely, 2^{1280111061447} is an apocalyptic number.

1280111061447 is a deficient number, since it is larger than the sum of its proper divisors (568938249545).

1280111061447 is a wasteful number, since it uses less digits than its factorization.

1280111061447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142234562389 (or 142234562386 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 36.

The spelling of 1280111061447 in words is "one trillion, two hundred eighty billion, one hundred eleven million, sixty-one thousand, four hundred forty-seven".