27726881768 has 16 divisors (see below), whose sum is σ = 52151907780. Its totient is φ = 13819706368.

The previous prime is 27726881723. The next prime is 27726881837. The reversal of 27726881768 is 86718862772.

It can be written as a sum of positive squares in 2 ways, for example, as 23722776484 + 4004105284 = 154022^2 + 63278^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 27726881768.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5464121 + ... + 5469192.

Almost surely, 2^27726881768 is an apocalyptic number.

It is an amenable number.

27726881768 is a deficient number, since it is larger than the sum of its proper divisors (24425026012).

27726881768 is a wasteful number, since it uses less digits than its factorization.

27726881768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10933636 (or 10933632 counting only the distinct ones).

The product of its digits is 25288704, while the sum is 62.

The spelling of 27726881768 in words is "twenty-seven billion, seven hundred twenty-six million, eight hundred eighty-one thousand, seven hundred sixty-eight".