1273688222077 has 2 divisors, whose sum is σ = 1273688222078. Its totient is φ = 1273688222076.

The previous prime is 1273688222011. The next prime is 1273688222159. The reversal of 1273688222077 is 7702228863721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1199187065476 + 74501156601 = 1095074^2 + 272949^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1273688222077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1273688292077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 636844111038 + 636844111039.

It is an arithmetic number, because the mean of its divisors is an integer number (636844111039).

Almost surely, 2^{1273688222077} is an apocalyptic number.

It is an amenable number.

1273688222077 is a deficient number, since it is larger than the sum of its proper divisors (1).

1273688222077 is an equidigital number, since it uses as much as digits as its factorization.

1273688222077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6322176, while the sum is 55.

The spelling of 1273688222077 in words is "one trillion, two hundred seventy-three billion, six hundred eighty-eight million, two hundred twenty-two thousand, seventy-seven".