27530077081 has 4 divisors (see below), whose sum is σ = 29647775332. Its totient is φ = 25412378832.

The previous prime is 27530077067. The next prime is 27530077103. The reversal of 27530077081 is 18077003572.

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 13768675600 + 13761401481 = 117340^2 + 117309^2 .

It is a cyclic number.

It is not a de Polignac number, because 27530077081 - 2³³ = 18940142489 is a prime.

It is a super-2 number, since 2×27530077081² (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 (27530077061) 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 3 ways as a sum of consecutive naturals, for example, 1058849106 + ... + 1058849131.

It is an arithmetic number, because the mean of its divisors is an integer number (7411943833).

Almost surely, 2^27530077081 is an apocalyptic number.

It is an amenable number.

27530077081 is a deficient number, since it is larger than the sum of its proper divisors (2117698251).

27530077081 is a wasteful number, since it uses less digits than its factorization.

27530077081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2117698250.

The product of its (nonzero) digits is 82320, while the sum is 40.

The spelling of 27530077081 in words is "twenty-seven billion, five hundred thirty million, seventy-seven thousand, eighty-one".