27738278597 has 2 divisors, whose sum is σ = 27738278598. Its totient is φ = 27738278596.

The previous prime is 27738278479. The next prime is 27738278639. The reversal of 27738278597 is 79587283772.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24913781281 + 2824497316 = 157841^2 + 53146^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27738278597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27738278297) 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, 13869139298 + 13869139299.

It is an arithmetic number, because the mean of its divisors is an integer number (13869139299).

Almost surely, 2^27738278597 is an apocalyptic number.

It is an amenable number.

27738278597 is a deficient number, since it is larger than the sum of its proper divisors (1).

27738278597 is an equidigital number, since it uses as much as digits as its factorization.

27738278597 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82978560, while the sum is 65.

The spelling of 27738278597 in words is "twenty-seven billion, seven hundred thirty-eight million, two hundred seventy-eight thousand, five hundred ninety-seven".