27768384061 has 4 divisors (see below), whose sum is σ = 30292782624. Its totient is φ = 25243985500.

The previous prime is 27768384029. The next prime is 27768384221. The reversal of 27768384061 is 16048386772.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 27768384061 - 2⁵ = 27768384029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27768384961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1262199265 + ... + 1262199286.

It is an arithmetic number, because the mean of its divisors is an integer number (7573195656).

Almost surely, 2^27768384061 is an apocalyptic number.

It is an amenable number.

27768384061 is a deficient number, since it is larger than the sum of its proper divisors (2524398563).

27768384061 is a wasteful number, since it uses less digits than its factorization.

27768384061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2524398562.

The product of its (nonzero) digits is 2709504, while the sum is 52.

The spelling of 27768384061 in words is "twenty-seven billion, seven hundred sixty-eight million, three hundred eighty-four thousand, sixty-one".