27264160991 has 4 divisors (see below), whose sum is σ = 27478839552. Its totient is φ = 27049482432.

The previous prime is 27264160939. The next prime is 27264160997. The reversal of 27264160991 is 19906146272.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27264160991 is a prime.

It is a super-2 number, since 2×27264160991² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27264160997) 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, 107339090 + ... + 107339343.

It is an arithmetic number, because the mean of its divisors is an integer number (6869709888).

Almost surely, 2^27264160991 is an apocalyptic number.

27264160991 is a deficient number, since it is larger than the sum of its proper divisors (214678561).

27264160991 is a wasteful number, since it uses less digits than its factorization.

27264160991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214678560.

The product of its (nonzero) digits is 326592, while the sum is 47.

The spelling of 27264160991 in words is "twenty-seven billion, two hundred sixty-four million, one hundred sixty thousand, nine hundred ninety-one".