27561164 has 12 divisors (see below), whose sum is σ = 48774600. Its totient is φ = 13625568.

The previous prime is 27561161. The next prime is 27561173. The reversal of 27561164 is 46116572.

It is a super-2 number, since 2×27561164² = 1519235522069792, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 27561164.

It is not an unprimeable number, because it can be changed into a prime (27561161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38354 + ... + 39065.

It is an arithmetic number, because the mean of its divisors is an integer number (4064550).

Almost surely, 2^27561164 is an apocalyptic number.

It is an amenable number.

27561164 is a deficient number, since it is larger than the sum of its proper divisors (21213436).

27561164 is a wasteful number, since it uses less digits than its factorization.

27561164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77512 (or 77510 counting only the distinct ones).

The product of its digits is 10080, while the sum is 32.

The square root of 27561164 is about 5249.8727603629. The cubic root of 27561164 is about 302.0641502248.

The spelling of 27561164 in words is "twenty-seven million, five hundred sixty-one thousand, one hundred sixty-four".