27420173668845 has 64 divisors (see below), whose sum is σ = 52814780663040. Its totient is φ = 13443762253824.

The previous prime is 27420173668841. The next prime is 27420173668897. The reversal of 27420173668845 is 54886637102472.

27420173668845 is a `hidden beast` number, since 2 + 7 + 420 + 1 + 73 + 6 + 68 + 84 + 5 = 666.

It is not a de Polignac number, because 27420173668845 - 2² = 27420173668841 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27420173668841) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 138829084 + ... + 139026453.

It is an arithmetic number, because the mean of its divisors is an integer number (825230947860).

Almost surely, 2^{27420173668845} is an apocalyptic number.

It is an amenable number.

27420173668845 is a deficient number, since it is larger than the sum of its proper divisors (25394606994195).

27420173668845 is a wasteful number, since it uses less digits than its factorization.

27420173668845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277855611 (or 277855605 counting only the distinct ones).

The product of its (nonzero) digits is 108380160, while the sum is 63.

The spelling of 27420173668845 in words is "twenty-seven trillion, four hundred twenty billion, one hundred seventy-three million, six hundred sixty-eight thousand, eight hundred forty-five".