1278796843920 has 160 divisors (see below), whose sum is σ = 4200008896512. Its totient is φ = 320758235136.

The previous prime is 1278796843799. The next prime is 1278796843927. The reversal of 1278796843920 is 293486978721.

It is a Cunningham number, because it is equal to 1130839²-1.

It is not an unprimeable number, because it can be changed into a prime (1278796843927) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6690804 + ... + 6879276.

Almost surely, 2^{1278796843920} is an apocalyptic number.

1278796843920 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 1278796843920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2100004448256).

1278796843920 is an abundant number, since it is smaller than the sum of its proper divisors (2921212052592).

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

1278796843920 is a wasteful number, since it uses less digits than its factorization.

1278796843920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190169 (or 190163 counting only the distinct ones).

The product of its (nonzero) digits is 73156608, while the sum is 66.

The spelling of 1278796843920 in words is "one trillion, two hundred seventy-eight billion, seven hundred ninety-six million, eight hundred forty-three thousand, nine hundred twenty".