127976075977 has 2 divisors, whose sum is σ = 127976075978. Its totient is φ = 127976075976.

The previous prime is 127976075971. The next prime is 127976076001. The reversal of 127976075977 is 779570679721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 104005605001 + 23970470976 = 322499^2 + 154824^2 .

It is a cyclic number.

It is not a de Polignac number, because 127976075977 - 2²³ = 127967687369 is a prime.

It is not a weakly prime, because it can be changed into another prime (127976075971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63988037988 + 63988037989.

It is an arithmetic number, because the mean of its divisors is an integer number (63988037989).

Almost surely, 2^127976075977 is an apocalyptic number.

It is an amenable number.

127976075977 is a deficient number, since it is larger than the sum of its proper divisors (1).

127976075977 is an equidigital number, since it uses as much as digits as its factorization.

127976075977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81682020, while the sum is 67.

The spelling of 127976075977 in words is "one hundred twenty-seven billion, nine hundred seventy-six million, seventy-five thousand, nine hundred seventy-seven".