27727107869 has 2 divisors, whose sum is σ = 27727107870. Its totient is φ = 27727107868.

The previous prime is 27727107853. The next prime is 27727107893. The reversal of 27727107869 is 96870172772.

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., 17308822969 + 10418284900 = 131563^2 + 102070^2 .

It is a cyclic number.

It is not a de Polignac number, because 27727107869 - 2⁴ = 27727107853 is a prime.

It is a super-2 number, since 2×27727107869² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27727107809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13863553934 + 13863553935.

It is an arithmetic number, because the mean of its divisors is an integer number (13863553935).

Almost surely, 2^27727107869 is an apocalyptic number.

It is an amenable number.

27727107869 is a deficient number, since it is larger than the sum of its proper divisors (1).

27727107869 is an equidigital number, since it uses as much as digits as its factorization.

27727107869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4148928, while the sum is 56.

The spelling of 27727107869 in words is "twenty-seven billion, seven hundred twenty-seven million, one hundred seven thousand, eight hundred sixty-nine".