1296905955817 has 2 divisors, whose sum is σ = 1296905955818. Its totient is φ = 1296905955816.

The previous prime is 1296905955799. The next prime is 1296905955853. The reversal of 1296905955817 is 7185595096921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1258713461776 + 38192494041 = 1121924^2 + 195429^2 .

It is a cyclic number.

It is not a de Polignac number, because 1296905955817 - 2¹⁹ = 1296905431529 is a prime.

It is a super-2 number, since 2×1296905955817² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1296905955017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 648452977908 + 648452977909.

It is an arithmetic number, because the mean of its divisors is an integer number (648452977909).

Almost surely, 2^{1296905955817} is an apocalyptic number.

It is an amenable number.

1296905955817 is a deficient number, since it is larger than the sum of its proper divisors (1).

1296905955817 is an equidigital number, since it uses as much as digits as its factorization.

1296905955817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 61236000, while the sum is 67.

The spelling of 1296905955817 in words is "one trillion, two hundred ninety-six billion, nine hundred five million, nine hundred fifty-five thousand, eight hundred seventeen".