1275966988800 has 960 divisors, whose sum is σ = 5059141908480. Its totient is φ = 277170094080.

The previous prime is 1275966988799. The next prime is 1275966988819. The reversal of 1275966988800 is 88896695721.

It is a tau number, because it is divible by the number of its divisors (960).

It is a Harshad number since it is a multiple of its sum of digits (69).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1106649024 + ... + 1106650176.

It is an arithmetic number, because the mean of its divisors is an integer number (5269939488).

Almost surely, 2^{1275966988800} is an apocalyptic number.

1275966988800 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 1275966988800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2529570954240).

1275966988800 is an abundant number, since it is smaller than the sum of its proper divisors (3783174919680).

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

1275966988800 is a wasteful number, since it uses less digits than its factorization.

1275966988800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1393 (or 1372 counting only the distinct ones).

The product of its (nonzero) digits is 104509440, while the sum is 69.

The spelling of 1275966988800 in words is "one trillion, two hundred seventy-five billion, nine hundred sixty-six million, nine hundred eighty-eight thousand, eight hundred".