27285691097691 has 12 divisors (see below), whose sum is σ = 42444408374368. Its totient is φ = 16791194521584.

The previous prime is 27285691097689. The next prime is 27285691097711. The reversal of 27285691097691 is 19679019658272.

27285691097691 is a `hidden beast` number, since 27 + 28 + 569 + 10 + 9 + 7 + 6 + 9 + 1 = 666.

It is not a de Polignac number, because 27285691097691 - 2¹ = 27285691097689 is a prime.

It is a super-2 number, since 2×27285691097691² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (27285691097611) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 116605517395 + ... + 116605517628.

Almost surely, 2^{27285691097691} is an apocalyptic number.

27285691097691 is a deficient number, since it is larger than the sum of its proper divisors (15158717276677).

27285691097691 is a wasteful number, since it uses less digits than its factorization.

27285691097691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233211035042 (or 233211035039 counting only the distinct ones).

The product of its (nonzero) digits is 205752960, while the sum is 72.

The spelling of 27285691097691 in words is "twenty-seven trillion, two hundred eighty-five billion, six hundred ninety-one million, ninety-seven thousand, six hundred ninety-one".