27773665647 has 24 divisors (see below), whose sum is σ = 46391180976. Its totient is φ = 14649844608.

The previous prime is 27773665637. The next prime is 27773665691. The reversal of 27773665647 is 74656637772.

It is not a de Polignac number, because 27773665647 - 2⁶ = 27773665583 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27773665627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7264878 + ... + 7268699.

It is an arithmetic number, because the mean of its divisors is an integer number (1932965874).

Almost surely, 2^27773665647 is an apocalyptic number.

27773665647 is a deficient number, since it is larger than the sum of its proper divisors (18617515329).

27773665647 is a wasteful number, since it uses less digits than its factorization.

27773665647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14533607 (or 14533600 counting only the distinct ones).

The product of its digits is 62233920, while the sum is 60.

The spelling of 27773665647 in words is "twenty-seven billion, seven hundred seventy-three million, six hundred sixty-five thousand, six hundred forty-seven".