1280106392978 has 8 divisors (see below), whose sum is σ = 2194468102272. Its totient is φ = 548617025556.

The previous prime is 1280106392963. The next prime is 1280106393043. The reversal of 1280106392978 is 8792936010821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 45718085450 + ... + 45718085477.

It is an arithmetic number, because the mean of its divisors is an integer number (274308512784).

Almost surely, 2^{1280106392978} is an apocalyptic number.

1280106392978 is a deficient number, since it is larger than the sum of its proper divisors (914361709294).

1280106392978 is an equidigital number, since it uses as much as digits as its factorization.

1280106392978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91436170936.

The product of its (nonzero) digits is 2612736, while the sum is 56.

The spelling of 1280106392978 in words is "one trillion, two hundred eighty billion, one hundred six million, three hundred ninety-two thousand, nine hundred seventy-eight".