27755555278027 has 4 divisors (see below), whose sum is σ = 27772935088816. Its totient is φ = 27738175467240.

The previous prime is 27755555277977. The next prime is 27755555278067. The reversal of 27755555278027 is 72087255555772.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 27755555278027 - 2²⁷ = 27755421060299 is a prime.

It is a super-2 number, since 2×27755555278027² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27755555278067) 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, 8689902999 + ... + 8689906192.

It is an arithmetic number, because the mean of its divisors is an integer number (6943233772204).

Almost surely, 2^{27755555278027} is an apocalyptic number.

27755555278027 is a deficient number, since it is larger than the sum of its proper divisors (17379810789).

27755555278027 is a wasteful number, since it uses less digits than its factorization.

27755555278027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17379810788.

The product of its (nonzero) digits is 480200000, while the sum is 67.

The spelling of 27755555278027 in words is "twenty-seven trillion, seven hundred fifty-five billion, five hundred fifty-five million, two hundred seventy-eight thousand, twenty-seven".