27806243047 has 16 divisors (see below), whose sum is σ = 32086579968. Its totient is φ = 23848102080.

The previous prime is 27806243039. The next prime is 27806243083. The reversal of 27806243047 is 74034260872.

It is not a de Polignac number, because 27806243047 - 2³ = 27806243039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27806242994 and 27806243012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27806243027) 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 15 ways as a sum of consecutive naturals, for example, 734313 + ... + 771250.

It is an arithmetic number, because the mean of its divisors is an integer number (2005411248).

Almost surely, 2^27806243047 is an apocalyptic number.

27806243047 is a deficient number, since it is larger than the sum of its proper divisors (4280336921).

27806243047 is a wasteful number, since it uses less digits than its factorization.

27806243047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1505670.

The product of its (nonzero) digits is 451584, while the sum is 43.

The spelling of 27806243047 in words is "twenty-seven billion, eight hundred six million, two hundred forty-three thousand, forty-seven".