1275326179691 has 2 divisors, whose sum is σ = 1275326179692. Its totient is φ = 1275326179690.

The previous prime is 1275326179627. The next prime is 1275326179703. The reversal of 1275326179691 is 1969716235721.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1275326179691 - 2⁶ = 1275326179627 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1275326179691.

It is not a weakly prime, because it can be changed into another prime (1275326173691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 637663089845 + 637663089846.

It is an arithmetic number, because the mean of its divisors is an integer number (637663089846).

Almost surely, 2^{1275326179691} is an apocalyptic number.

1275326179691 is a deficient number, since it is larger than the sum of its proper divisors (1).

1275326179691 is an equidigital number, since it uses as much as digits as its factorization.

1275326179691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8573040, while the sum is 59.

The spelling of 1275326179691 in words is "one trillion, two hundred seventy-five billion, three hundred twenty-six million, one hundred seventy-nine thousand, six hundred ninety-one".