27639304897 has 4 divisors (see below), whose sum is σ = 27640139716. Its totient is φ = 27638470080.

The previous prime is 27639304879. The next prime is 27639304909. The reversal of 27639304897 is 79840393672.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17138999056 + 10500305841 = 130916^2 + 102471^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27639304897 is a prime.

It is a super-3 number, since 3×27639304897³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27639304877) 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 3 ways as a sum of consecutive naturals, for example, 365604 + ... + 434677.

It is an arithmetic number, because the mean of its divisors is an integer number (6910034929).

Almost surely, 2^27639304897 is an apocalyptic number.

It is an amenable number.

27639304897 is a deficient number, since it is larger than the sum of its proper divisors (834819).

27639304897 is an equidigital number, since it uses as much as digits as its factorization.

27639304897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 834818.

The product of its (nonzero) digits is 13716864, while the sum is 58.

The spelling of 27639304897 in words is "twenty-seven billion, six hundred thirty-nine million, three hundred four thousand, eight hundred ninety-seven".