27640613267 has 4 divisors (see below), whose sum is σ = 27710237376. Its totient is φ = 27570989160.

The previous prime is 27640613243. The next prime is 27640613279. The reversal of 27640613267 is 76231604672.

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 27640613267 - 2¹⁶ = 27640547731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27640613207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34811459 + ... + 34812252.

It is an arithmetic number, because the mean of its divisors is an integer number (6927559344).

Almost surely, 2^27640613267 is an apocalyptic number.

27640613267 is a deficient number, since it is larger than the sum of its proper divisors (69624109).

27640613267 is an equidigital number, since it uses as much as digits as its factorization.

27640613267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69624108.

The product of its (nonzero) digits is 508032, while the sum is 44.

The spelling of 27640613267 in words is "twenty-seven billion, six hundred forty million, six hundred thirteen thousand, two hundred sixty-seven".