1296729776726 has 16 divisors (see below), whose sum is σ = 1968588954864. Its totient is φ = 640533930144.

The previous prime is 1296729776711. The next prime is 1296729776729. The reversal of 1296729776726 is 6276779276921.

It is a super-2 number, since 2×1296729776726² (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 1296729776726.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1296729776729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6521636 + ... + 6717528.

It is an arithmetic number, because the mean of its divisors is an integer number (123036809679).

Almost surely, 2^{1296729776726} is an apocalyptic number.

1296729776726 is a deficient number, since it is larger than the sum of its proper divisors (671859178138).

1296729776726 is a wasteful number, since it uses less digits than its factorization.

1296729776726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235855.

The product of its digits is 336063168, while the sum is 71.

The spelling of 1296729776726 in words is "one trillion, two hundred ninety-six billion, seven hundred twenty-nine million, seven hundred seventy-six thousand, seven hundred twenty-six".