1275684668399 has 2 divisors, whose sum is σ = 1275684668400. Its totient is φ = 1275684668398.

The previous prime is 1275684668299. The next prime is 1275684668411. The reversal of 1275684668399 is 9938664865721.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1275684668399 - 2²⁸ = 1275416232943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1275684668299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 637842334199 + 637842334200.

It is an arithmetic number, because the mean of its divisors is an integer number (637842334200).

Almost surely, 2^{1275684668399} is an apocalyptic number.

1275684668399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1275684668399 is an equidigital number, since it uses as much as digits as its factorization.

1275684668399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 940584960, while the sum is 74.

The spelling of 1275684668399 in words is "one trillion, two hundred seventy-five billion, six hundred eighty-four million, six hundred sixty-eight thousand, three hundred ninety-nine".