27049875681 has 4 divisors (see below), whose sum is σ = 36066500912. Its totient is φ = 18033250452.

The previous prime is 27049875661. The next prime is 27049875683. The reversal of 27049875681 is 18657894072.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 27049875681 - 2⁹ = 27049875169 is a prime.

It is a super-2 number, since 2×27049875681² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27049875683) 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, 4508312611 + ... + 4508312616.

It is an arithmetic number, because the mean of its divisors is an integer number (9016625228).

Almost surely, 2^27049875681 is an apocalyptic number.

It is an amenable number.

27049875681 is a deficient number, since it is larger than the sum of its proper divisors (9016625231).

27049875681 is an equidigital number, since it uses as much as digits as its factorization.

27049875681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9016625230.

The product of its (nonzero) digits is 6773760, while the sum is 57.

The spelling of 27049875681 in words is "twenty-seven billion, forty-nine million, eight hundred seventy-five thousand, six hundred eighty-one".