27771640373 has 8 divisors (see below), whose sum is σ = 28231123896. Its totient is φ = 27312292800.

The previous prime is 27771640363. The next prime is 27771640381. The reversal of 27771640373 is 37304617772.

It can be written as a sum of positive squares in 4 ways, for example, as 101646724 + 27669993649 = 10082^2 + 166343^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27771640373 - 2⁴ = 27771640357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27771640313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 429815 + ... + 490187.

It is an arithmetic number, because the mean of its divisors is an integer number (3528890487).

Almost surely, 2^27771640373 is an apocalyptic number.

It is an amenable number.

27771640373 is a deficient number, since it is larger than the sum of its proper divisors (459483523).

27771640373 is an equidigital number, since it uses as much as digits as its factorization.

27771640373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67975.

The product of its (nonzero) digits is 1037232, while the sum is 47.

The spelling of 27771640373 in words is "twenty-seven billion, seven hundred seventy-one million, six hundred forty thousand, three hundred seventy-three".