1278473589120 has 1536 divisors, whose sum is σ = 5302983720960. Its totient is φ = 256197427200.

The previous prime is 1278473589079. The next prime is 1278473589199. The reversal of 1278473589120 is 219853748721.

It is a happy number.

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 191 ways as a sum of consecutive naturals, for example, 4717614585 + ... + 4717614855.

It is an arithmetic number, because the mean of its divisors is an integer number (3452463360).

Almost surely, 2^{1278473589120} is an apocalyptic number.

1278473589120 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 1278473589120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2651491860480).

1278473589120 is an abundant number, since it is smaller than the sum of its proper divisors (4024510131840).

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

1278473589120 is a wasteful number, since it uses less digits than its factorization.

1278473589120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424 (or 399 counting only the distinct ones).

The product of its (nonzero) digits is 6773760, while the sum is 57.

The spelling of 1278473589120 in words is "one trillion, two hundred seventy-eight billion, four hundred seventy-three million, five hundred eighty-nine thousand, one hundred twenty".