1278296547996 has 384 divisors, whose sum is σ = 3724375818240. Its totient is φ = 336744345600.

The previous prime is 1278296547989. The next prime is 1278296548051. The reversal of 1278296547996 is 6997456928721.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 204622545 + ... + 204628791.

It is an arithmetic number, because the mean of its divisors is an integer number (9698895360).

Almost surely, 2^{1278296547996} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1278296547996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1862187909120).

1278296547996 is an abundant number, since it is smaller than the sum of its proper divisors (2446079270244).

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

1278296547996 is a wasteful number, since it uses less digits than its factorization.

1278296547996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6465 (or 6463 counting only the distinct ones).

The product of its digits is 823011840, while the sum is 75.

The spelling of 1278296547996 in words is "one trillion, two hundred seventy-eight billion, two hundred ninety-six million, five hundred forty-seven thousand, nine hundred ninety-six".