1281144139552 has 24 divisors (see below), whose sum is σ = 2522588984496. Its totient is φ = 640486619712.

The previous prime is 1281144139519. The next prime is 1281144139577. The reversal of 1281144139552 is 2559314411821.

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, 2426338 + ... + 2906785.

It is an arithmetic number, because the mean of its divisors is an integer number (105107874354).

Almost surely, 2^{1281144139552} is an apocalyptic number.

It is an amenable number.

1281144139552 is a deficient number, since it is larger than the sum of its proper divisors (1241444844944).

1281144139552 is an equidigital number, since it uses as much as digits as its factorization.

1281144139552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5340640 (or 5340632 counting only the distinct ones).

The product of its digits is 345600, while the sum is 46.

The spelling of 1281144139552 in words is "one trillion, two hundred eighty-one billion, one hundred forty-four million, one hundred thirty-nine thousand, five hundred fifty-two".