27664221311 has 4 divisors (see below), whose sum is σ = 27675102432. Its totient is φ = 27653340192.

The previous prime is 27664221307. The next prime is 27664221323. The reversal of 27664221311 is 11312246672.

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 27664221311 - 2² = 27664221307 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27664221301) 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, 5436746 + ... + 5441831.

It is an arithmetic number, because the mean of its divisors is an integer number (6918775608).

Almost surely, 2^27664221311 is an apocalyptic number.

27664221311 is a deficient number, since it is larger than the sum of its proper divisors (10881121).

27664221311 is a wasteful number, since it uses less digits than its factorization.

27664221311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10881120.

The product of its digits is 24192, while the sum is 35.

Adding to 27664221311 its reverse (11312246672), we get a palindrome (38976467983).

The spelling of 27664221311 in words is "twenty-seven billion, six hundred sixty-four million, two hundred twenty-one thousand, three hundred eleven".