27772741291 has 4 divisors (see below), whose sum is σ = 27773637472. Its totient is φ = 27771845112.

The previous prime is 27772741267. The next prime is 27772741307. The reversal of 27772741291 is 19214727772.

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 27772741291 - 2¹¹ = 27772739243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27772741211) 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, 399876 + ... + 464161.

It is an arithmetic number, because the mean of its divisors is an integer number (6943409368).

Almost surely, 2^27772741291 is an apocalyptic number.

27772741291 is a deficient number, since it is larger than the sum of its proper divisors (896181).

27772741291 is an equidigital number, since it uses as much as digits as its factorization.

27772741291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 896180.

The product of its digits is 691488, while the sum is 49.

The spelling of 27772741291 in words is "twenty-seven billion, seven hundred seventy-two million, seven hundred forty-one thousand, two hundred ninety-one".