27685953247 has 4 divisors (see below), whose sum is σ = 28640641320. Its totient is φ = 26731265176.

The previous prime is 27685953241. The next prime is 27685953257. The reversal of 27685953247 is 74235958672.

It is a happy number.

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 27685953247 - 2¹¹ = 27685951199 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27685953191 and 27685953200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27685953241) 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, 477343993 + ... + 477344050.

It is an arithmetic number, because the mean of its divisors is an integer number (7160160330).

Almost surely, 2^27685953247 is an apocalyptic number.

27685953247 is a deficient number, since it is larger than the sum of its proper divisors (954688073).

27685953247 is an equidigital number, since it uses as much as digits as its factorization.

27685953247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 954688072.

The product of its digits is 25401600, while the sum is 58.

The spelling of 27685953247 in words is "twenty-seven billion, six hundred eighty-five million, nine hundred fifty-three thousand, two hundred forty-seven".