1277149795553 has 2 divisors, whose sum is σ = 1277149795554. Its totient is φ = 1277149795552.

The previous prime is 1277149795511. The next prime is 1277149795601. The reversal of 1277149795553 is 3555979417721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1227559850209 + 49589945344 = 1107953^2 + 222688^2 .

It is a cyclic number.

It is not a de Polignac number, because 1277149795553 - 2³² = 1272854828257 is a prime.

It is a super-2 number, since 2×1277149795553² (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 1277149795553.

It is not a weakly prime, because it can be changed into another prime (1277149735553) 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, 638574897776 + 638574897777.

It is an arithmetic number, because the mean of its divisors is an integer number (638574897777).

Almost surely, 2^{1277149795553} is an apocalyptic number.

It is an amenable number.

1277149795553 is a deficient number, since it is larger than the sum of its proper divisors (1).

1277149795553 is an equidigital number, since it uses as much as digits as its factorization.

1277149795553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 83349000, while the sum is 65.

It can be divided in two parts, 1277149 and 795553, that added together give a palindrome (2072702).

The spelling of 1277149795553 in words is "one trillion, two hundred seventy-seven billion, one hundred forty-nine million, seven hundred ninety-five thousand, five hundred fifty-three".