1276387484881 has 2 divisors, whose sum is σ = 1276387484882. Its totient is φ = 1276387484880.

The previous prime is 1276387484837. The next prime is 1276387484929. The reversal of 1276387484881 is 1884847836721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 781074158656 + 495313326225 = 883784^2 + 703785^2 .

It is an emirp because it is prime and its reverse (1884847836721) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1276387484881 is a prime.

It is a super-2 number, since 2×1276387484881² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1276387484081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 638193742440 + 638193742441.

It is an arithmetic number, because the mean of its divisors is an integer number (638193742441).

Almost surely, 2^{1276387484881} is an apocalyptic number.

It is an amenable number.

1276387484881 is a deficient number, since it is larger than the sum of its proper divisors (1).

1276387484881 is an equidigital number, since it uses as much as digits as its factorization.

1276387484881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 115605504, while the sum is 67.

The spelling of 1276387484881 in words is "one trillion, two hundred seventy-six billion, three hundred eighty-seven million, four hundred eighty-four thousand, eight hundred eighty-one".