27747684051 has 4 divisors (see below), whose sum is σ = 36996912072. Its totient is φ = 18498456032.

The previous prime is 27747684043. The next prime is 27747684067. The reversal of 27747684051 is 15048674772.

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

It is a cyclic number.

It is not a de Polignac number, because 27747684051 - 2³ = 27747684043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27747683985 and 27747684003.

It is not an unprimeable number, because it can be changed into a prime (27747684071) 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 3 ways as a sum of consecutive naturals, for example, 4624614006 + ... + 4624614011.

It is an arithmetic number, because the mean of its divisors is an integer number (9249228018).

Almost surely, 2^27747684051 is an apocalyptic number.

27747684051 is a deficient number, since it is larger than the sum of its proper divisors (9249228021).

27747684051 is an equidigital number, since it uses as much as digits as its factorization.

27747684051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9249228020.

The product of its (nonzero) digits is 2634240, while the sum is 51.

The spelling of 27747684051 in words is "twenty-seven billion, seven hundred forty-seven million, six hundred eighty-four thousand, fifty-one".