1281448276992 has 704 divisors, whose sum is σ = 4229865776640. Its totient is φ = 380677128192.

The previous prime is 1281448276991. The next prime is 1281448277023. The reversal of 1281448276992 is 2996728441821.

1281448276992 is a `hidden beast` number, since 1 + 2 + 8 + 1 + 4 + 482 + 7 + 69 + 92 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1281448276991) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2220880608 + ... + 2220881184.

Almost surely, 2^{1281448276992} is an apocalyptic number.

1281448276992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1281448276992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2114932888320).

1281448276992 is an abundant number, since it is smaller than the sum of its proper divisors (2948417499648).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1281448276992 is a wasteful number, since it uses less digits than its factorization.

1281448276992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 823 (or 799 counting only the distinct ones).

The product of its digits is 27869184, while the sum is 63.

The spelling of 1281448276992 in words is "one trillion, two hundred eighty-one billion, four hundred forty-eight million, two hundred seventy-six thousand, nine hundred ninety-two".