1279578406794 has 16 divisors (see below), whose sum is σ = 2621575272960. Its totient is φ = 416123059040.

The previous prime is 1279578406789. The next prime is 1279578406819. The reversal of 1279578406794 is 4976048759721.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2600768874 + ... + 2600769365.

It is an arithmetic number, because the mean of its divisors is an integer number (163848454560).

Almost surely, 2^{1279578406794} is an apocalyptic number.

1279578406794 is an abundant number, since it is smaller than the sum of its proper divisors (1341996866166).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1279578406794 is a wasteful number, since it uses less digits than its factorization.

1279578406794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5201538285.

The product of its (nonzero) digits is 213373440, while the sum is 69.

The spelling of 1279578406794 in words is "one trillion, two hundred seventy-nine billion, five hundred seventy-eight million, four hundred six thousand, seven hundred ninety-four".