1280679005825 has 24 divisors (see below), whose sum is σ = 1610838771000. Its totient is φ = 1009853775360.

The previous prime is 1280679005813. The next prime is 1280679005849. The reversal of 1280679005825 is 5285009760821.

It can be written as a sum of positive squares in 12 ways, for example, as 53141314576 + 1227537691249 = 230524^2 + 1107943^2 .

It is not a de Polignac number, because 1280679005825 - 2⁸ = 1280679005569 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2600411 + ... + 3053439.

It is an arithmetic number, because the mean of its divisors is an integer number (67118282125).

Almost surely, 2^{1280679005825} is an apocalyptic number.

It is an amenable number.

1280679005825 is a deficient number, since it is larger than the sum of its proper divisors (330159765175).

1280679005825 is a wasteful number, since it uses less digits than its factorization.

1280679005825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454661 (or 454656 counting only the distinct ones).

The product of its (nonzero) digits is 2419200, while the sum is 53.

The spelling of 1280679005825 in words is "one trillion, two hundred eighty billion, six hundred seventy-nine million, five thousand, eight hundred twenty-five".