1277157761141 has 2 divisors, whose sum is σ = 1277157761142. Its totient is φ = 1277157761140.

The previous prime is 1277157761119. The next prime is 1277157761213. The reversal of 1277157761141 is 1411677517721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 640393660516 + 636764100625 = 800246^2 + 797975^2 .

It is an emirp because it is prime and its reverse (1411677517721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1277157761141 - 2³⁸ = 1002279854197 is a prime.

It is a super-2 number, since 2×1277157761141² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1277157761141.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1277157761101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 638578880570 + 638578880571.

It is an arithmetic number, because the mean of its divisors is an integer number (638578880571).

Almost surely, 2^{1277157761141} is an apocalyptic number.

It is an amenable number.

1277157761141 is a deficient number, since it is larger than the sum of its proper divisors (1).

1277157761141 is an equidigital number, since it uses as much as digits as its factorization.

1277157761141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576240, while the sum is 50.

The spelling of 1277157761141 in words is "one trillion, two hundred seventy-seven billion, one hundred fifty-seven million, seven hundred sixty-one thousand, one hundred forty-one".