1280806862648 has 32 divisors (see below), whose sum is σ = 2479377600000. Its totient is φ = 619646112480.

The previous prime is 1280806862591. The next prime is 1280806862651. The reversal of 1280806862648 is 8462686080821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1152203 + ... + 1972101.

It is an arithmetic number, because the mean of its divisors is an integer number (77480550000).

Almost surely, 2^{1280806862648} is an apocalyptic number.

It is an amenable number.

1280806862648 is a deficient number, since it is larger than the sum of its proper divisors (1198570737352).

1280806862648 is a wasteful number, since it uses less digits than its factorization.

1280806862648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 826235 (or 826231 counting only the distinct ones).

The product of its (nonzero) digits is 14155776, while the sum is 59.

The spelling of 1280806862648 in words is "one trillion, two hundred eighty billion, eight hundred six million, eight hundred sixty-two thousand, six hundred forty-eight".