127266281557 has 2 divisors, whose sum is σ = 127266281558. Its totient is φ = 127266281556.

The previous prime is 127266281509. The next prime is 127266281563. The reversal of 127266281557 is 755182662721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 106635555601 + 20630725956 = 326551^2 + 143634^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-127266281557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (127266281567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63633140778 + 63633140779.

It is an arithmetic number, because the mean of its divisors is an integer number (63633140779).

Almost surely, 2^127266281557 is an apocalyptic number.

It is an amenable number.

127266281557 is a deficient number, since it is larger than the sum of its proper divisors (1).

127266281557 is an equidigital number, since it uses as much as digits as its factorization.

127266281557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2822400, while the sum is 52.

The spelling of 127266281557 in words is "one hundred twenty-seven billion, two hundred sixty-six million, two hundred eighty-one thousand, five hundred fifty-seven".