1287945792000 has 2560 divisors, whose sum is σ = 5791129344000. Its totient is φ = 281788416000.

The previous prime is 1287945791971. The next prime is 1287945792017. The reversal of 1287945792000 is 2975497821.

1287945792000 is a `hidden beast` number, since 1 + 287 + 94 + 5 + 79 + 200 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (2560).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 24300863974 + ... + 24300864026.

It is an arithmetic number, because the mean of its divisors is an integer number (2262159900).

Almost surely, 2^{1287945792000} is an apocalyptic number.

1287945792000 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 1287945792000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2895564672000).

1287945792000 is an abundant number, since it is smaller than the sum of its proper divisors (4503183552000).

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

1287945792000 is an frugal number, since it uses more digits than its factorization.

1287945792000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157 (or 111 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 54.

The spelling of 1287945792000 in words is "one trillion, two hundred eighty-seven billion, nine hundred forty-five million, seven hundred ninety-two thousand".