1271450880000 has 720 divisors, whose sum is σ = 5244630431040. Its totient is φ = 290598912000.

The previous prime is 1271450879981. The next prime is 1271450880013. The reversal of 1271450880000 is 880541721.

1271450880000 is a `hidden beast` number, since 1 + 2 + 71 + 4 + 508 + 80 + 0 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (720).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 80632117 + ... + 80647883.

It is an arithmetic number, because the mean of its divisors is an integer number (7284208932).

Almost surely, 2^{1271450880000} is an apocalyptic number.

1271450880000 is a gapful number since it is divisible by the number (10) 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 1271450880000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2622315215520).

1271450880000 is an abundant number, since it is smaller than the sum of its proper divisors (3973179551040).

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

1271450880000 is an equidigital number, since it uses as much as digits as its factorization.

1271450880000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15822 (or 15784 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 36.

The spelling of 1271450880000 in words is "one trillion, two hundred seventy-one billion, four hundred fifty million, eight hundred eighty thousand".