1278374243328 has 1584 divisors, whose sum is σ = 4965727559520. Its totient is φ = 313026674688.

The previous prime is 1278374243323. The next prime is 1278374243339. The reversal of 1278374243328 is 8233424738721.

1278374243328 is a `hidden beast` number, since 1 + 2 + 7 + 8 + 3 + 74 + 243 + 328 = 666.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1278374243323) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 8142511026 + ... + 8142511182.

Almost surely, 2^{1278374243328} is an apocalyptic number.

1278374243328 is a gapful number since it is divisible by the number (18) 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 1278374243328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2482863779760).

1278374243328 is an abundant number, since it is smaller than the sum of its proper divisors (3687353316192).

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

1278374243328 is a wasteful number, since it uses less digits than its factorization.

1278374243328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302 (or 274 counting only the distinct ones).

The product of its digits is 10838016, while the sum is 54.

The spelling of 1278374243328 in words is "one trillion, two hundred seventy-eight billion, three hundred seventy-four million, two hundred forty-three thousand, three hundred twenty-eight".