1278320084448 has 192 divisors, whose sum is σ = 3789009342720. Its totient is φ = 373801164800.

The previous prime is 1278320084429. The next prime is 1278320084491. The reversal of 1278320084448 is 8444800238721.

It is a self number, because there is not a number n which added to its sum of digits gives 1278320084448.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59124136 + ... + 59145752.

It is an arithmetic number, because the mean of its divisors is an integer number (19734423660).

Almost surely, 2^{1278320084448} 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 1278320084448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1894504671360).

1278320084448 is an abundant number, since it is smaller than the sum of its proper divisors (2510689258272).

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

1278320084448 is a wasteful number, since it uses less digits than its factorization.

1278320084448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23601 (or 23593 counting only the distinct ones).

The product of its (nonzero) digits is 2752512, while the sum is 51.

The spelling of 1278320084448 in words is "one trillion, two hundred seventy-eight billion, three hundred twenty million, eighty-four thousand, four hundred forty-eight".