27319747969 has 2 divisors, whose sum is σ = 27319747970. Its totient is φ = 27319747968.

The previous prime is 27319747963. The next prime is 27319748021. The reversal of 27319747969 is 96974791372.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16459607025 + 10860140944 = 128295^2 + 104212^2 .

It is a cyclic number.

It is not a de Polignac number, because 27319747969 - 2²¹ = 27317650817 is a prime.

It is a super-2 number, since 2×27319747969² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 27319747969.

It is not a weakly prime, because it can be changed into another prime (27319747963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13659873984 + 13659873985.

It is an arithmetic number, because the mean of its divisors is an integer number (13659873985).

Almost surely, 2^27319747969 is an apocalyptic number.

It is an amenable number.

27319747969 is a deficient number, since it is larger than the sum of its proper divisors (1).

27319747969 is an equidigital number, since it uses as much as digits as its factorization.

27319747969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36006768, while the sum is 64.

The spelling of 27319747969 in words is "twenty-seven billion, three hundred nineteen million, seven hundred forty-seven thousand, nine hundred sixty-nine".