1278912653888 has 28 divisors (see below), whose sum is σ = 2537956165632. Its totient is φ = 639427635840.

The previous prime is 1278912653861. The next prime is 1278912653891. The reversal of 1278912653888 is 8883562198721.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1026881 + ... + 1900607.

Almost surely, 2^{1278912653888} is an apocalyptic number.

It is an amenable number.

1278912653888 is a deficient number, since it is larger than the sum of its proper divisors (1259043511744).

1278912653888 is an equidigital number, since it uses as much as digits as its factorization.

1278912653888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 896610 (or 896600 counting only the distinct ones).

The product of its digits is 92897280, while the sum is 68.

The spelling of 1278912653888 in words is "one trillion, two hundred seventy-eight billion, nine hundred twelve million, six hundred fifty-three thousand, eight hundred eighty-eight".