27128390668 has 12 divisors (see below), whose sum is σ = 47477820600. Its totient is φ = 13563299072.

The previous prime is 27128390623. The next prime is 27128390761. The reversal of 27128390668 is 86609382172.

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, 153493 + ... + 278956.

It is an arithmetic number, because the mean of its divisors is an integer number (3956485050).

Almost surely, 2^27128390668 is an apocalyptic number.

It is an amenable number.

27128390668 is a deficient number, since it is larger than the sum of its proper divisors (20349429932).

27128390668 is a wasteful number, since it uses less digits than its factorization.

27128390668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448136 (or 448134 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 52.

The spelling of 27128390668 in words is "twenty-seven billion, one hundred twenty-eight million, three hundred ninety thousand, six hundred sixty-eight".