1275891624697 has 2 divisors, whose sum is σ = 1275891624698. Its totient is φ = 1275891624696.

The previous prime is 1275891624673. The next prime is 1275891624731. The reversal of 1275891624697 is 7964261985721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1270769216656 + 5122408041 = 1127284^2 + 71571^2 .

It is a cyclic number.

It is not a de Polignac number, because 1275891624697 - 2¹⁹ = 1275891100409 is a prime.

It is not a weakly prime, because it can be changed into another prime (1275891627697) 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 as a sum of consecutive naturals, namely, 637945812348 + 637945812349.

It is an arithmetic number, because the mean of its divisors is an integer number (637945812349).

Almost surely, 2^{1275891624697} is an apocalyptic number.

It is an amenable number.

1275891624697 is a deficient number, since it is larger than the sum of its proper divisors (1).

1275891624697 is an equidigital number, since it uses as much as digits as its factorization.

1275891624697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 91445760, while the sum is 67.

The spelling of 1275891624697 in words is "one trillion, two hundred seventy-five billion, eight hundred ninety-one million, six hundred twenty-four thousand, six hundred ninety-seven".