27838862749 has 2 divisors, whose sum is σ = 27838862750. Its totient is φ = 27838862748.

The previous prime is 27838862743. The next prime is 27838862813. The reversal of 27838862749 is 94726883872.

It is a happy number.

It is an a-pointer prime, because the next prime (27838862813) can be obtained adding 27838862749 to its sum of digits (64).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17830260900 + 10008601849 = 133530^2 + 100043^2 .

It is a cyclic number.

It is not a de Polignac number, because 27838862749 - 2¹¹ = 27838860701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27838862743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13919431374 + 13919431375.

It is an arithmetic number, because the mean of its divisors is an integer number (13919431375).

Almost surely, 2^27838862749 is an apocalyptic number.

It is an amenable number.

27838862749 is a deficient number, since it is larger than the sum of its proper divisors (1).

27838862749 is an equidigital number, since it uses as much as digits as its factorization.

27838862749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 65028096, while the sum is 64.

The spelling of 27838862749 in words is "twenty-seven billion, eight hundred thirty-eight million, eight hundred sixty-two thousand, seven hundred forty-nine".