1278796843927 has 2 divisors, whose sum is σ = 1278796843928. Its totient is φ = 1278796843926.

The previous prime is 1278796843799. The next prime is 1278796843943. The reversal of 1278796843927 is 7293486978721.

It is a strong prime.

It is an emirp because it is prime and its reverse (7293486978721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1278796843927 - 2⁷ = 1278796843799 is a prime.

It is a super-4 number, since 4×1278796843927⁴ (a number of 50 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1278796843927.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1278796843127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 639398421963 + 639398421964.

It is an arithmetic number, because the mean of its divisors is an integer number (639398421964).

Almost surely, 2^{1278796843927} is an apocalyptic number.

1278796843927 is a deficient number, since it is larger than the sum of its proper divisors (1).

1278796843927 is an equidigital number, since it uses as much as digits as its factorization.

1278796843927 is an evil number, because the sum of its binary digits is even.

The product of its digits is 512096256, while the sum is 73.

The spelling of 1278796843927 in words is "one trillion, two hundred seventy-eight billion, seven hundred ninety-six million, eight hundred forty-three thousand, nine hundred twenty-seven".