27617831009 has 4 divisors (see below), whose sum is σ = 27677481216. Its totient is φ = 27558180804.

The previous prime is 27617830991. The next prime is 27617831023. The reversal of 27617831009 is 90013871672.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27617831009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27617831039) 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, 29824409 + ... + 29825334.

It is an arithmetic number, because the mean of its divisors is an integer number (6919370304).

Almost surely, 2^27617831009 is an apocalyptic number.

It is an amenable number.

27617831009 is a deficient number, since it is larger than the sum of its proper divisors (59650207).

27617831009 is an equidigital number, since it uses as much as digits as its factorization.

27617831009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59650206.

The product of its (nonzero) digits is 127008, while the sum is 44.

The spelling of 27617831009 in words is "twenty-seven billion, six hundred seventeen million, eight hundred thirty-one thousand, nine".