27743561134657 has 4 divisors (see below), whose sum is σ = 27751057372116. Its totient is φ = 27736064897200.

The previous prime is 27743561134633. The next prime is 27743561134669. The reversal of 27743561134657 is 75643116534772.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10686256392256 + 17057304742401 = 3268984^2 + 4130049^2 .

It is a cyclic number.

It is not a de Polignac number, because 27743561134657 - 2⁷ = 27743561134529 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27743561134595 and 27743561134604.

It is not an unprimeable number, because it can be changed into a prime (27743561132657) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3748113178 + ... + 3748120579.

It is an arithmetic number, because the mean of its divisors is an integer number (6937764343029).

Almost surely, 2^{27743561134657} is an apocalyptic number.

It is an amenable number.

27743561134657 is a deficient number, since it is larger than the sum of its proper divisors (7496237459).

27743561134657 is an equidigital number, since it uses as much as digits as its factorization.

27743561134657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7496237458.

The product of its digits is 88905600, while the sum is 61.

The spelling of 27743561134657 in words is "twenty-seven trillion, seven hundred forty-three billion, five hundred sixty-one million, one hundred thirty-four thousand, six hundred fifty-seven".