27749111609 has 8 divisors (see below), whose sum is σ = 28236083400. Its totient is φ = 27263174400.

The previous prime is 27749111591. The next prime is 27749111617. The reversal of 27749111609 is 90611194772.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 42510400 + 27706601209 = 6520^2 + 166453^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27749111609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27749111699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 204434 + ... + 311915.

It is an arithmetic number, because the mean of its divisors is an integer number (3529510425).

Almost surely, 2^27749111609 is an apocalyptic number.

It is an amenable number.

27749111609 is a deficient number, since it is larger than the sum of its proper divisors (486971791).

27749111609 is an equidigital number, since it uses as much as digits as its factorization.

27749111609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517291.

The product of its (nonzero) digits is 190512, while the sum is 47.

The spelling of 27749111609 in words is "twenty-seven billion, seven hundred forty-nine million, one hundred eleven thousand, six hundred nine".