27761856271 has 4 divisors (see below), whose sum is σ = 28352534112. Its totient is φ = 27171178432.

The previous prime is 27761856257. The next prime is 27761856293. The reversal of 27761856271 is 17265816772.

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 27761856271 - 2¹¹ = 27761854223 is a prime.

It is a super-2 number, since 2×27761856271² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27761856371) 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, 295338850 + ... + 295338943.

It is an arithmetic number, because the mean of its divisors is an integer number (7088133528).

Almost surely, 2^27761856271 is an apocalyptic number.

27761856271 is a deficient number, since it is larger than the sum of its proper divisors (590677841).

27761856271 is an equidigital number, since it uses as much as digits as its factorization.

27761856271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590677840.

The product of its digits is 1975680, while the sum is 52.

The spelling of 27761856271 in words is "twenty-seven billion, seven hundred sixty-one million, eight hundred fifty-six thousand, two hundred seventy-one".