27747708218 has 4 divisors (see below), whose sum is σ = 41621562330. Its totient is φ = 13873854108.

The previous prime is 27747708151. The next prime is 27747708223. The reversal of 27747708218 is 81280774772.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 26891736169 + 855972049 = 163987^2 + 29257^2 .

It is a super-2 number, since 2×27747708218² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 27747708218.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6936927053 + ... + 6936927056.

Almost surely, 2^27747708218 is an apocalyptic number.

27747708218 is a deficient number, since it is larger than the sum of its proper divisors (13873854112).

27747708218 is a wasteful number, since it uses less digits than its factorization.

27747708218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13873854111.

The product of its (nonzero) digits is 2458624, while the sum is 53.

The spelling of 27747708218 in words is "twenty-seven billion, seven hundred forty-seven million, seven hundred eight thousand, two hundred eighteen".