27744347677 has 2 divisors, whose sum is σ = 27744347678. Its totient is φ = 27744347676.

The previous prime is 27744347671. The next prime is 27744347689. The reversal of 27744347677 is 77674344772.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15327925636 + 12416422041 = 123806^2 + 111429^2 .

It is a cyclic number.

It is not a de Polignac number, because 27744347677 - 2²⁷ = 27610129949 is a prime.

It is a super-3 number, since 3×27744347677³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27744347671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13872173838 + 13872173839.

It is an arithmetic number, because the mean of its divisors is an integer number (13872173839).

Almost surely, 2^27744347677 is an apocalyptic number.

It is an amenable number.

27744347677 is a deficient number, since it is larger than the sum of its proper divisors (1).

27744347677 is an equidigital number, since it uses as much as digits as its factorization.

27744347677 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38723328, while the sum is 58.

The spelling of 27744347677 in words is "twenty-seven billion, seven hundred forty-four million, three hundred forty-seven thousand, six hundred seventy-seven".