27309247218 has 54 divisors (see below), whose sum is σ = 65056510701. Its totient is φ = 8273192400.

The previous prime is 27309247213. The next prime is 27309247247. The reversal of 27309247218 is 81274290372.

It can be written as a sum of positive squares in 2 ways, for example, as 27127078209 + 182169009 = 164703^2 + 13497^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=116853.

It is a super-2 number, since 2×27309247218² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (27309247213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 7710528 + ... + 7714068.

Almost surely, 2^27309247218 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27309247218

27309247218 is an abundant number, since it is smaller than the sum of its proper divisors (37747263483).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27309247218 is an equidigital number, since it uses as much as digits as its factorization.

27309247218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7112 (or 3557 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The spelling of 27309247218 in words is "twenty-seven billion, three hundred nine million, two hundred forty-seven thousand, two hundred eighteen".