27505554971 has 4 divisors (see below), whose sum is σ = 27722134272. Its totient is φ = 27288975672.

The previous prime is 27505554961. The next prime is 27505555009. The reversal of 27505554971 is 17945550572.

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 27505554971 - 2¹⁰ = 27505553947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27505554941) 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, 108289460 + ... + 108289713.

It is an arithmetic number, because the mean of its divisors is an integer number (6930533568).

Almost surely, 2^27505554971 is an apocalyptic number.

27505554971 is a deficient number, since it is larger than the sum of its proper divisors (216579301).

27505554971 is a wasteful number, since it uses less digits than its factorization.

27505554971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216579300.

The product of its (nonzero) digits is 2205000, while the sum is 50.

The spelling of 27505554971 in words is "twenty-seven billion, five hundred five million, five hundred fifty-four thousand, nine hundred seventy-one".