127771672771 has 2 divisors, whose sum is σ = 127771672772. Its totient is φ = 127771672770.

The previous prime is 127771672757. The next prime is 127771672817. The reversal of 127771672771 is 177276177721.

It is a weak prime.

It is an emirp because it is prime and its reverse (177276177721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 127771672771 - 2¹¹ = 127771670723 is a prime.

It is not a weakly prime, because it can be changed into another prime (127771672741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63885836385 + 63885836386.

It is an arithmetic number, because the mean of its divisors is an integer number (63885836386).

Almost surely, 2^127771672771 is an apocalyptic number.

127771672771 is a deficient number, since it is larger than the sum of its proper divisors (1).

127771672771 is an equidigital number, since it uses as much as digits as its factorization.

127771672771 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2823576, while the sum is 55.

The spelling of 127771672771 in words is "one hundred twenty-seven billion, seven hundred seventy-one million, six hundred seventy-two thousand, seven hundred seventy-one".