27655400455673 has 4 divisors (see below), whose sum is σ = 27655415015028. Its totient is φ = 27655385896320.

The previous prime is 27655400455651. The next prime is 27655400455769. The reversal of 27655400455673 is 37655400455672.

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

It can be written as a sum of positive squares in 2 ways, for example, as 13595502835264 + 14059897620409 = 3687208^2 + 3749653^2 .

It is a cyclic number.

It is not a de Polignac number, because 27655400455673 - 2¹² = 27655400451577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27655400455643) 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, 3910736 + ... + 8402657.

It is an arithmetic number, because the mean of its divisors is an integer number (6913853753757).

Almost surely, 2^{27655400455673} is an apocalyptic number.

It is an amenable number.

27655400455673 is a deficient number, since it is larger than the sum of its proper divisors (14559355).

27655400455673 is a wasteful number, since it uses less digits than its factorization.

27655400455673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14559354.

The product of its (nonzero) digits is 105840000, while the sum is 59.

Subtracting 27655400455673 from its reverse (37655400455672), we obtain a palindrome (9999999999999).

The spelling of 27655400455673 in words is "twenty-seven trillion, six hundred fifty-five billion, four hundred million, four hundred fifty-five thousand, six hundred seventy-three".