27568089426721 has 4 divisors (see below), whose sum is σ = 27568135379844. Its totient is φ = 27568043473600.

The previous prime is 27568089426707. The next prime is 27568089426769. The reversal of 27568089426721 is 12762498086572.

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 198042800400 + 27370046626321 = 445020^2 + 5231639^2 .

It is a cyclic number.

It is not a de Polignac number, because 27568089426721 - 2³¹ = 27565941943073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27568089406721) 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, 22064620 + ... + 23280541.

It is an arithmetic number, because the mean of its divisors is an integer number (6892033844961).

Almost surely, 2^{27568089426721} is an apocalyptic number.

It is an amenable number.

27568089426721 is a deficient number, since it is larger than the sum of its proper divisors (45953123).

27568089426721 is an equidigital number, since it uses as much as digits as its factorization.

27568089426721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45953122.

The product of its (nonzero) digits is 162570240, while the sum is 67.

The spelling of 27568089426721 in words is "twenty-seven trillion, five hundred sixty-eight billion, eighty-nine million, four hundred twenty-six thousand, seven hundred twenty-one".