1271074771639 has 2 divisors, whose sum is σ = 1271074771640. Its totient is φ = 1271074771638.

The previous prime is 1271074771627. The next prime is 1271074771643. The reversal of 1271074771639 is 9361774701721.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1271074771639 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1271074771639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1271074771669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 635537385819 + 635537385820.

It is an arithmetic number, because the mean of its divisors is an integer number (635537385820).

Almost surely, 2^{1271074771639} is an apocalyptic number.

1271074771639 is a deficient number, since it is larger than the sum of its proper divisors (1).

1271074771639 is an equidigital number, since it uses as much as digits as its factorization.

1271074771639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3111696, while the sum is 55.

The spelling of 1271074771639 in words is "one trillion, two hundred seventy-one billion, seventy-four million, seven hundred seventy-one thousand, six hundred thirty-nine".