27706371807 has 4 divisors (see below), whose sum is σ = 36941829080. Its totient is φ = 18470914536.

The previous prime is 27706371733. The next prime is 27706371821. The reversal of 27706371807 is 70817360772.

It is a happy number.

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

It is not a de Polignac number, because 27706371807 - 2¹¹ = 27706369759 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 (27706371307) 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, 4617728632 + ... + 4617728637.

It is an arithmetic number, because the mean of its divisors is an integer number (9235457270).

Almost surely, 2^27706371807 is an apocalyptic number.

27706371807 is a deficient number, since it is larger than the sum of its proper divisors (9235457273).

27706371807 is an equidigital number, since it uses as much as digits as its factorization.

27706371807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9235457272.

The product of its (nonzero) digits is 691488, while the sum is 48.

The spelling of 27706371807 in words is "twenty-seven billion, seven hundred six million, three hundred seventy-one thousand, eight hundred seven".