27607177691 has 4 divisors (see below), whose sum is σ = 27851489112. Its totient is φ = 27362866272.

The previous prime is 27607177657. The next prime is 27607177699. The reversal of 27607177691 is 19677170672.

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 27607177691 - 2³⁰ = 26533435867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27607177699) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122155541 + ... + 122155766.

It is an arithmetic number, because the mean of its divisors is an integer number (6962872278).

Almost surely, 2^27607177691 is an apocalyptic number.

27607177691 is a deficient number, since it is larger than the sum of its proper divisors (244311421).

27607177691 is a wasteful number, since it uses less digits than its factorization.

27607177691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244311420.

The product of its (nonzero) digits is 1555848, while the sum is 53.

The spelling of 27607177691 in words is "twenty-seven billion, six hundred seven million, one hundred seventy-seven thousand, six hundred ninety-one".