27696561 has 8 divisors (see below), whose sum is σ = 36987264. Its totient is φ = 18435120.

The previous prime is 27696551. The next prime is 27696563. The reversal of 27696561 is 16569672.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 27696561 - 2⁹ = 27696049 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (27696563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5001 + ... + 8966.

It is an arithmetic number, because the mean of its divisors is an integer number (4623408).

Almost surely, 2^27696561 is an apocalyptic number.

It is an amenable number.

27696561 is a deficient number, since it is larger than the sum of its proper divisors (9290703).

27696561 is a wasteful number, since it uses less digits than its factorization.

27696561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14631.

The product of its digits is 136080, while the sum is 42.

The square root of 27696561 is about 5262.7522267346. The cubic root of 27696561 is about 302.5579826471.

The spelling of 27696561 in words is "twenty-seven million, six hundred ninety-six thousand, five hundred sixty-one".