27444865697 has 2 divisors, whose sum is σ = 27444865698. Its totient is φ = 27444865696.

The previous prime is 27444865681. The next prime is 27444865741. The reversal of 27444865697 is 79656844472.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21963536401 + 5481329296 = 148201^2 + 74036^2 .

It is a cyclic number.

It is not a de Polignac number, because 27444865697 - 2⁴ = 27444865681 is a prime.

It is not a weakly prime, because it can be changed into another prime (27444865607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13722432848 + 13722432849.

It is an arithmetic number, because the mean of its divisors is an integer number (13722432849).

Almost surely, 2^27444865697 is an apocalyptic number.

It is an amenable number.

27444865697 is a deficient number, since it is larger than the sum of its proper divisors (1).

27444865697 is an equidigital number, since it uses as much as digits as its factorization.

27444865697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81285120, while the sum is 62.

The spelling of 27444865697 in words is "twenty-seven billion, four hundred forty-four million, eight hundred sixty-five thousand, six hundred ninety-seven".