27347881685 has 4 divisors (see below), whose sum is σ = 32817458028. Its totient is φ = 21878305344.

The previous prime is 27347881597. The next prime is 27347881699. The reversal of 27347881685 is 58618874372.

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

It can be written as a sum of positive squares in 2 ways, for example, as 14353477636 + 12994404049 = 119806^2 + 113993^2 .

It is a cyclic number.

It is not a de Polignac number, because 27347881685 - 2¹⁴ = 27347865301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2734788164 + ... + 2734788173.

It is an arithmetic number, because the mean of its divisors is an integer number (8204364507).

Almost surely, 2^27347881685 is an apocalyptic number.

It is an amenable number.

27347881685 is a deficient number, since it is larger than the sum of its proper divisors (5469576343).

27347881685 is an equidigital number, since it uses as much as digits as its factorization.

27347881685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5469576342.

The product of its digits is 18063360, while the sum is 59.

The spelling of 27347881685 in words is "twenty-seven billion, three hundred forty-seven million, eight hundred eighty-one thousand, six hundred eighty-five".