1296555777137 has 2 divisors, whose sum is σ = 1296555777138. Its totient is φ = 1296555777136.

The previous prime is 1296555777067. The next prime is 1296555777161. The reversal of 1296555777137 is 7317775556921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1268216074801 + 28339702336 = 1126151^2 + 168344^2 .

It is a cyclic number.

It is not a de Polignac number, because 1296555777137 - 2⁸ = 1296555776881 is a prime.

It is not a weakly prime, because it can be changed into another prime (1296555776137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 648277888568 + 648277888569.

It is an arithmetic number, because the mean of its divisors is an integer number (648277888569).

Almost surely, 2^{1296555777137} is an apocalyptic number.

It is an amenable number.

1296555777137 is a deficient number, since it is larger than the sum of its proper divisors (1).

1296555777137 is an equidigital number, since it uses as much as digits as its factorization.

1296555777137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 97240500, while the sum is 65.

The spelling of 1296555777137 in words is "one trillion, two hundred ninety-six billion, five hundred fifty-five million, seven hundred seventy-seven thousand, one hundred thirty-seven".