27964739449 has 2 divisors, whose sum is σ = 27964739450. Its totient is φ = 27964739448.

The previous prime is 27964739417. The next prime is 27964739483. The reversal of 27964739449 is 94493746972.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26297487225 + 1667252224 = 162165^2 + 40832^2 .

It is a cyclic number.

It is not a de Polignac number, because 27964739449 - 2⁵ = 27964739417 is a prime.

It is not a weakly prime, because it can be changed into another prime (27964739549) 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, 13982369724 + 13982369725.

It is an arithmetic number, because the mean of its divisors is an integer number (13982369725).

Almost surely, 2^27964739449 is an apocalyptic number.

It is an amenable number.

27964739449 is a deficient number, since it is larger than the sum of its proper divisors (1).

27964739449 is an equidigital number, since it uses as much as digits as its factorization.

27964739449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82301184, while the sum is 64.

The spelling of 27964739449 in words is "twenty-seven billion, nine hundred sixty-four million, seven hundred thirty-nine thousand, four hundred forty-nine".