1280408921612 has 12 divisors (see below), whose sum is σ = 2246063385720. Its totient is φ = 638676525696.

The previous prime is 1280408921609. The next prime is 1280408921641. The reversal of 1280408921612 is 2161298040821.

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, 381981893 + ... + 381985244.

It is an arithmetic number, because the mean of its divisors is an integer number (187171948810).

Almost surely, 2^{1280408921612} is an apocalyptic number.

It is an amenable number.

1280408921612 is a deficient number, since it is larger than the sum of its proper divisors (965654464108).

1280408921612 is a wasteful number, since it uses less digits than its factorization.

1280408921612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763967560 (or 763967558 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 44.

The spelling of 1280408921612 in words is "one trillion, two hundred eighty billion, four hundred eight million, nine hundred twenty-one thousand, six hundred twelve".