27158518568 has 16 divisors (see below), whose sum is σ = 50925576660. Its totient is φ = 13578364800.

The previous prime is 27158518567. The next prime is 27158518619. The reversal of 27158518568 is 86581585172.

It can be written as a sum of positive squares in 2 ways, for example, as 26011883524 + 1146635044 = 161282^2 + 33862^2 .

It is not an unprimeable number, because it can be changed into a prime (27158518567) 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, 27428 + ... + 234668.

Almost surely, 2^27158518568 is an apocalyptic number.

It is an amenable number.

27158518568 is a deficient number, since it is larger than the sum of its proper divisors (23767058092).

27158518568 is a wasteful number, since it uses less digits than its factorization.

27158518568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223628 (or 223624 counting only the distinct ones).

The product of its digits is 5376000, while the sum is 56.

The spelling of 27158518568 in words is "twenty-seven billion, one hundred fifty-eight million, five hundred eighteen thousand, five hundred sixty-eight".