1296905105663 has 4 divisors (see below), whose sum is σ = 1297024547880. Its totient is φ = 1296785663448.

The previous prime is 1296905105653. The next prime is 1296905105681. The reversal of 1296905105663 is 3665015096921.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1296905105663 - 2⁴ = 1296905105647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1296905105623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59704820 + ... + 59726537.

It is an arithmetic number, because the mean of its divisors is an integer number (324256136970).

Almost surely, 2^{1296905105663} is an apocalyptic number.

1296905105663 is a deficient number, since it is larger than the sum of its proper divisors (119442217).

1296905105663 is a wasteful number, since it uses less digits than its factorization.

1296905105663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119442216.

The product of its (nonzero) digits is 2624400, while the sum is 53.

The spelling of 1296905105663 in words is "one trillion, two hundred ninety-six billion, nine hundred five million, one hundred five thousand, six hundred sixty-three".