1268440694797 has 6 divisors (see below), whose sum is σ = 1272784705322. Its totient is φ = 1264111460112.

The previous prime is 1268440694779. The next prime is 1268440694803. The reversal of 1268440694797 is 7974960448621.

It can be written as a sum of positive squares in 3 ways, for example, as 892560120516 + 375880574281 = 944754^2 + 613091^2 .

It is not a de Polignac number, because 1268440694797 - 2¹⁵ = 1268440662029 is a prime.

It is a super-2 number, since 2×1268440694797² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1268440694737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7301778 + ... + 7473475.

Almost surely, 2^{1268440694797} is an apocalyptic number.

It is an amenable number.

1268440694797 is a deficient number, since it is larger than the sum of its proper divisors (4344010525).

1268440694797 is an frugal number, since it uses more digits than its factorization.

1268440694797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14775839 (or 14775546 counting only the distinct ones).

The product of its (nonzero) digits is 146313216, while the sum is 67.

The spelling of 1268440694797 in words is "one trillion, two hundred sixty-eight billion, four hundred forty million, six hundred ninety-four thousand, seven hundred ninety-seven".