27644817245 has 6 divisors (see below), whose sum is σ = 33174226842. Its totient is φ = 22115556368.

The previous prime is 27644817227. The next prime is 27644817253. The reversal of 27644817245 is 54271844672.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1433531044 + 26211286201 = 37862^2 + 161899^2 .

It is a de Polignac number, because none of the positive numbers 2^k-27644817245 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27644817193 and 27644817202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 334607 + ... + 408963.

It is an arithmetic number, because the mean of its divisors is an integer number (5529037807).

Almost surely, 2^27644817245 is an apocalyptic number.

It is an amenable number.

27644817245 is a deficient number, since it is larger than the sum of its proper divisors (5529409597).

27644817245 is an frugal number, since it uses more digits than its factorization.

27644817245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148719 (or 74362 counting only the distinct ones).

The product of its digits is 3010560, while the sum is 50.

The spelling of 27644817245 in words is "twenty-seven billion, six hundred forty-four million, eight hundred seventeen thousand, two hundred forty-five".