27747684049 has 4 divisors (see below), whose sum is σ = 27748038564. Its totient is φ = 27747329536.

The previous prime is 27747684043. The next prime is 27747684067. The reversal of 27747684049 is 94048674772.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 2102864449 + 25644819600 = 45857^2 + 160140^2 .

It is a cyclic number.

It is not a de Polignac number, because 27747684049 - 2⁵ = 27747684017 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27747683984 and 27747684002.

It is not an unprimeable number, because it can be changed into a prime (27747684043) 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, 2272 + ... + 235585.

It is an arithmetic number, because the mean of its divisors is an integer number (6937009641).

Almost surely, 2^27747684049 is an apocalyptic number.

It is an amenable number.

27747684049 is a deficient number, since it is larger than the sum of its proper divisors (354515).

27747684049 is a wasteful number, since it uses less digits than its factorization.

27747684049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354514.

The product of its (nonzero) digits is 18966528, while the sum is 58.

The spelling of 27747684049 in words is "twenty-seven billion, seven hundred forty-seven million, six hundred eighty-four thousand, forty-nine".